Cisco CCNP Networking
Flashcards to prepare for the Cisco CCNP Netowrking Exam.
295 Cards
3 Groups
Updated more than 2 years ago
Author: Hippocampus Labs
Cards (295)
Question
What are the main components of the Cisco Enterprise Architecture model?
Answer
The main components of the Cisco Enterprise Architecture model are the access layer, distribution layer, and core layer.
Question
What is the purpose of the access layer in an enterprise network?
Answer
The access layer provides devices with network access and controls user traffic within the local area network (LAN).
Question
What is a key design principle for enterprise networks?
Answer
A key design principle for enterprise networks is scalability, which ensures the network can grow and adapt to increasing demands without significant reconfiguration.
Question
What role does redundancy play in enterprise network design?
Answer
Redundancy minimizes the risk of network failure by providing alternative paths and resources, ensuring high availability.
Question
What is a common network design model used for creating scalable and hierarchical networks?
Answer
The Cisco three-layer model (core, distribution, access) is a common design model used to create scalable and hierarchical networks.
Question
What is the primary function of a Layer 2 switch?
Answer
The primary function of a Layer 2 switch is to forward frames based on MAC addresses within the same local area network (LAN).
Question
What protocol is commonly used for VLAN tagging in Ethernet frames?
Answer
The protocol commonly used for VLAN tagging in Ethernet frames is IEEE 802.1Q.
Question
What does the term "routing" refer to in Layer 3 switching?
Answer
Routing refers to the process of forwarding packets between different networks based on IP addresses at Layer 3.
Question
What is the difference between a Layer 2 switch and a Layer 3 switch?
Answer
A Layer 2 switch operates at the data link layer and forwards traffic based on MAC addresses, while a Layer 3 switch operates at the network layer and can route traffic based on IP addresses.
Question
What feature do VLANs provide in a switched network environment?
Answer
VLANs provide segmentation of broadcast domains, which improves network traffic management and security by isolating different segments of a network.
Question
What is the purpose of the routing protocol in networking?
Answer
The purpose of a routing protocol is to enable routers to communicate with each other to discover and maintain routes to network destinations.
Question
What is the main difference between distance-vector and link-state routing protocols?
Answer
The main difference is that distance-vector protocols share their routing tables with neighbors, while link-state protocols share information about the entire network's topology.
Question
Which routing protocol uses the DUAL algorithm?
Answer
The Enhanced Interior Gateway Routing Protocol (EIGRP) uses the DUAL (Diffusing Update Algorithm) to determine the best path to a destination.
Question
What is a characteristic of OSPF as a link-state routing protocol?
Answer
OSPF supports hierarchical routing through the use of areas, allowing for scalable and efficient routing in larger networks.
Question
What network metric is commonly used by RIP?
Answer
The Routing Information Protocol (RIP) commonly uses hop count as its metric, with a maximum limit of 15 hops for route reachability.
Question
What is the purpose of a Wireless Access Point (WAP)?
Answer
A Wireless Access Point (WAP) connects wireless devices to a wired network, allowing them to communicate and access resources.
Question
What frequency bands are commonly used in Wi-Fi networks?
Answer
The commonly used frequency bands in Wi-Fi networks are 2.4 GHz and 5 GHz.
Question
What does SSID stand for in wireless networking?
Answer
SSID stands for Service Set Identifier, which is the name of a wireless network.
Question
What is the primary advantage of using the 5 GHz band over the 2.4 GHz band in Wi-Fi?
Answer
The primary advantage of using the 5 GHz band is its higher data rate and less congestion, offering better performance and more channels.
Question
What is the term for the area covered by a wireless access point?
Answer
The term for the area covered by a wireless access point is called a "wireless coverage area" or "Wi-Fi coverage area."
Question
What are the main functions of a firewall?
Answer
The main functions of a firewall include monitoring incoming and outgoing network traffic, enforcing security policies, blocking unauthorized access, and preventing attacks such as malware or denial of service.
Question
What is the purpose of Access Control Lists (ACLs) in network security?
Answer
Access Control Lists (ACLs) are used to filter traffic, allowing or denying specific traffic types based on defined rules, which helps to secure network resources.
Question
What is the difference between stateful and stateless firewalls?
Answer
Stateful firewalls keep track of the state of active connections and make decisions based on the context of traffic flows, while stateless firewalls treat each packet independently and do not maintain session information.
Question
What does VPN stand for, and what is its primary use?
Answer
VPN stands for Virtual Private Network, and its primary use is to create a secure and encrypted connection over a less secure network, such as the internet, ensuring the privacy and integrity of data.
Question
What is the role of Intrusion Detection Systems (IDS) in network security?
Answer
Intrusion Detection Systems (IDS) monitor network traffic for suspicious activity or policy violations and alert administrators about potential security breaches.
Question
What does QoS stand for in networking?
Answer
Quality of Service
Question
What are the main goals of QoS in network management?
Answer
To ensure reliable and consistent delivery of network services by managing bandwidth, minimizing latency, and reducing packet loss.
Question
What is the function of traffic classification in QoS?
Answer
Traffic classification identifies different types of network traffic to apply specific handling processes for each category, ensuring that critical data receives priority.
Question
What are some common QoS mechanisms used in IP networks?
Answer
Common QoS mechanisms include traffic shaping, traffic policing, queue management, and congestion avoidance techniques.
Question
What is the role of DiffServ in implementing QoS?
Answer
DiffServ (Differentiated Services) provides a framework for classifying and managing network traffic to ensure different levels of service based on predefined policies.
Question
What is the purpose of subnetting in IP addressing?
Answer
To divide a larger network into smaller, manageable sub-networks, improving efficiency and security.
Question
What is the formula to calculate the number of hosts in a subnet?
Answer
The formula is 2^(32 - subnet bits) - 2, where "subnet bits" is the number of bits used for the subnet mask.
Question
What is the default subnet mask for a Class C IP address?
Answer
The default subnet mask for a Class C IP address is 255.255.255.0.
Question
How many bits are used for the network portion in a Class B address?
Answer
In a Class B address, 16 bits are used for the network portion.
Question
What is the CIDR notation for a subnet mask of 255.255.255.224?
Answer
The CIDR notation for a subnet mask of 255.255.255.224 is /27.
Question
What is network automation?
Answer
Network automation is the use of software and technology to create processes that automatically manage and configure network devices without human intervention.
Question
What programming languages are commonly used in network automation?
Answer
Python, JavaScript, and Ruby are commonly used programming languages for network automation due to their flexibility and extensive libraries.
Question
What is the purpose of Ansible in network automation?
Answer
Ansible is an open-source automation tool used for configuration management, application deployment, and task automation across multiple devices and systems in network automation.
Question
Which protocol is often used for network device communication in automation?
Answer
NETCONF is a protocol used for managing network devices, enabling configuration changes and operational state retrieval via XML-based messages.
Question
What is the role of REST API in network programmability?
Answer
REST API allows applications to communicate with network devices using HTTP requests, enabling programmability by allowing developers to interact with network services in a standardized way.
Question
What is a common type of WAN technology that provides dedicated point-to-point connections?
Answer
Leased Line
Question
What protocol is primarily used for encapsulating PPP frames over Ethernet?
Answer
PPPoE (Point-to-Point Protocol over Ethernet)
Question
Which technology uses satellites to provide WAN connectivity?
Answer
VSAT (Very Small Aperture Terminal)
Question
What is the primary advantage of MPLS (Multiprotocol Label Switching) in WAN environments?
Answer
It allows for efficient traffic engineering and faster packet forwarding.
Question
What does the term "SD-WAN" stand for?
Answer
Software-Defined Wide Area Network
Question
What is network virtualization?
Answer
Network virtualization is the process of combining multiple physical networks into a single logical network, allowing for the abstraction of network resources and improved utilization.
Question
What are the two main types of network virtualization?
Answer
The two main types of network virtualization are network function virtualization (NFV) and software-defined networking (SDN).
Question
What is the purpose of VLANs in network virtualization?
Answer
VLANs (Virtual Local Area Networks) are used to segment a physical network into multiple logical networks, providing improved security, traffic management, and efficient use of network resources.
Question
What role do hypervisors play in network virtualization?
Answer
Hypervisors manage virtual machines and resources in a virtualized environment, enabling the sharing of physical hardware while isolating different workloads.
Question
What is the difference between overlay and underlay networks?
Answer
An overlay network is a virtual network built on top of an existing physical network (underlay), allowing for the creation of virtual segments that can improve scalability and management.
Question
What is the purpose of Cisco DNA Center in network management?
Answer
Cisco DNA Center serves as a centralized platform for managing and automating network operations, ensuring streamlined configurations, monitoring, and policy enforcement across a Cisco enterprise network.
Question
What is the function of Cisco Prime Infrastructure?
Answer
Cisco Prime Infrastructure provides comprehensive management of Cisco devices and wired/wireless networks, offering features for monitoring, troubleshooting, and reporting.
Question
What are the three main components of a Cisco IOS device configuration?
Answer
The three main components of a Cisco IOS device configuration are the running configuration, startup configuration, and the configuration register.
Question
What is the difference between ‘flash' and ‘NVRAM' in Cisco devices?
Answer
'Flash' is used for storing the IOS image and other files, while ‘NVRAM' is primarily used for storing the startup configuration file.
Question
What command can be used to save the running configuration to the startup configuration on a Cisco device?
Answer
The command to save the running configuration to the startup configuration is 'copy running-config startup-config'.
Question
What is the first step in a structured troubleshooting methodology?
Answer
The first step is to Identify the Problem.
Question
What is the purpose of establishing a theory of probable cause during troubleshooting?
Answer
The purpose is to hypothesize what might be causing the issue based on the information gathered.
Question
Which tool can be used to capture and analyze network packets?
Answer
Wireshark is a commonly used tool for capturing and analyzing network packets.
Question
What does the command 'ping' help diagnose in a network?
Answer
The ping command helps diagnose connectivity issues between devices on the network.
Question
What is the function of the 'traceroute' command in troubleshooting?
Answer
The traceroute command shows the path packets take to reach a destination, helping to identify where delays or failures occur.
Question
What is high availability in network design?
Answer
High availability refers to the design approach that aims to ensure continuous operation and minimal downtime in network services through redundancy and fault tolerance.
Question
What is the purpose of implementing redundant paths in a network?
Answer
Redundant paths are implemented to provide alternative routes for data traffic, ensuring that network communications can continue if one path fails.
Question
Which protocol is commonly used to achieve link redundancy in a Layer 2 network?
Answer
Spanning Tree Protocol (STP) is commonly used to prevent loops and achieve link redundancy in Layer 2 networks.
Question
What is the function of Hot Standby Router Protocol (HSRP)?
Answer
HSRP provides network resilience by allowing multiple routers to work together, with one active router and one or more standby routers, to ensure continued availability of IP services.
Question
What does the term "Failover" mean in the context of network design?
Answer
Failover refers to the process of automatically switching to a backup system or redundant network path when the primary system or path fails.
Question
What is the primary purpose of a data center?
Answer
The primary purpose of a data center is to house computer systems and associated components, including storage, networking, and management systems, for data processing and storage.
Question
What is a hyper-converged infrastructure (HCI)?
Answer
A hyper-converged infrastructure (HCI) is a type of IT framework that combines storage, compute, and networking in a single system, enabling easier management and scalability.
Question
What role does virtualization play in modern data centers?
Answer
Virtualization allows multiple virtual machines to run on a single physical server, improving resource utilization, reducing costs, and enhancing flexibility in data centers.
Question
What are the key components of a data center architecture?
Answer
The key components include compute resources (servers), storage systems, network infrastructure, power and cooling systems, and security solutions.
Question
What does Software-Defined Networking (SDN) allow in data centers?
Answer
Software-Defined Networking (SDN) allows for centralized management and automation of network resources, enabling dynamic adjustments to traffic patterns and policies based on real-time demands.
Question
What are the main components of Cisco's collaboration architecture?
Answer
The main components of Cisco's collaboration architecture include Cisco Unified Communications Manager, Cisco Webex, Cisco TelePresence, and Cisco Jabber.
Question
What protocols are commonly used for real-time communication in Cisco collaboration solutions?
Answer
Common protocols used for real-time communication include Session Initiation Protocol (SIP), H.323, and Real-Time Transport Protocol (RTP).
Question
What is the purpose of the Cisco Webex platform in collaboration services?
Answer
The purpose of Cisco Webex is to provide a cloud-based platform for video conferencing, online meetings, and team collaboration.
Question
What role does Quality of Service (QoS) play in collaboration services?
Answer
QoS ensures that voice and video traffic is prioritized on the network to maintain call clarity and reduce latency during collaboration sessions.
Question
What is the significance of Cisco Jabber in communication services?
Answer
Cisco Jabber provides instant messaging, voice, and video calling across different devices, enabling seamless communication for users anywhere.
Question
What are the key features of OSPF?
Answer
OSPF (Open Shortest Path First) is a link-state routing protocol that uses a hierarchical structure, supports VLSMs and CIDR, provides fast convergence, and utilizes a cost metric based on bandwidth for path selection.
Question
What command is used to enable OSPF on a router?
Answer
The command used to enable OSPF on a router is "router ospf [process-id]".
Question
What are EIGRP's main advantages?
Answer
EIGRP (Enhanced Interior Gateway Routing Protocol) offers fast convergence, supports unequal cost load balancing, utilizes a Diffusing Update Algorithm (DUAL) for path determination, and is IP protocol agnostic with support for multiple network layer protocols.
Question
How can BGP be optimized for efficiency?
Answer
BGP can be optimized by implementing route filtering, using prefix lists, configuring route maps, employing the next-hop selection process, and minimizing the number of prefixes advertised.
Question
What command would you use to display the OSPF neighbor relationship on a Cisco router?
Answer
The command to display the OSPF neighbor relationship is "show ip ospf neighbors".
Question
What is the main purpose of OSPF in a network?
Answer
The main purpose of OSPF (Open Shortest Path First) is to provide a dynamic routing protocol that allows routers to communicate routing information and optimize path selection within an IP network.
Question
What does EIGRP stand for?
Answer
EIGRP stands for Enhanced Interior Gateway Routing Protocol.
Question
Which OSPF state indicates that a router is fully converged with all OSPF neighbors?
Answer
The OSPF Full state indicates that a router is fully converged with all OSPF neighbors.
Question
What command is used to display the OSPF database on a Cisco router?
Answer
The command used to display the OSPF database on a Cisco router is "show ip ospf database".
Question
What is the default administrative distance of EIGRP for internal routes?
Answer
The default administrative distance of EIGRP for internal routes is 90.
Question
What is route redistribution in networking?
Answer
Route redistribution is the process of sharing routing information between different routing protocols, allowing routers to communicate and understand routes from other protocols.
Question
What is a common reason for route redistribution?
Answer
A common reason for route redistribution is to connect different network segments that use distinct routing protocols, enabling seamless communication across the entire network.
Question
Name a key consideration when implementing route redistribution.
Answer
A key consideration when implementing route redistribution is the potential for routing loops, which can be mitigated through the use of route maps or other filtering techniques.
Question
What role do route maps play in route redistribution?
Answer
Route maps are used in route redistribution to control the redistribution process by filtering routes and modifying route attributes, ensuring only specific routes are shared.
Question
Which command is used to initiate route redistribution in Cisco IOS?
Answer
The command used to initiate route redistribution in Cisco IOS is "router [protocol] redistribute [protocol-type]".
Question
What is the purpose of OSPF in a network?
Answer
OSPF (Open Shortest Path First) is used for routing IP packets within a single routing domain and enables routers to efficiently share routing information.
Question
What command is used to configure a static route on a Cisco router?
Answer
The command to configure a static route on a Cisco router is "ip route [destination_network] [subnet_mask] [next_hop]".
Question
What does the acronym BGP stand for in network routing?
Answer
BGP stands for Border Gateway Protocol, which is used to exchange routing information between autonomous systems on the internet.
Question
Which routing protocol uses the DUAL algorithm for route calculation?
Answer
EIGRP (Enhanced Interior Gateway Routing Protocol) uses the DUAL (Diffusing Update Algorithm) for route calculation to ensure loop-free and efficient routing.
Question
What is the function of route summarization in a network?
Answer
Route summarization reduces the number of routes in a routing table by combining multiple contiguous networks into a single route advertisement, which increases efficiency.
Question
What is the purpose of route filtering in network routing?
Answer
Route filtering is used to selectively allow or deny specific routes in the routing table to control which routes are advertised or accepted, thus influencing the flow of traffic.
Question
How do route maps function in Cisco routers?
Answer
Route maps allow for conditional routing based on various criteria, enabling administrators to define policies that manipulate routing decisions and control route propagation.
Question
What is policy-based routing (PBR)?
Answer
Policy-based routing is a technique used to make routing decisions based on policies set by the network administrator, rather than just the destination IP address, allowing for more granular control over traffic paths.
Question
How can route maps be applied to BGP?
Answer
Route maps can be applied to BGP to filter incoming or outgoing routes, modify attributes like MED (Multi-Exit Discriminator), and enforce policies that affect route selection and advertisement.
Question
What command is used to apply a route map to a specific interface?
Answer
The command used is 'ip policy route-map [route-map-name]', which applies the specified route map to influence traffic leaving that interface.
Question
What is the purpose of RADIUS in a network?
Answer
RADIUS (Remote Authentication Dial-In User Service) is used for centralized authentication, authorization, and accounting for users who connect to and use a network service.
Question
What advantage does OSPF offer over RIP in network routing?
Answer
OSPF (Open Shortest Path First) offers faster convergence and supports a larger, more scalable network due to its ability to use hierarchical design and link-state routing.
Question
What is the command to show the OSPF neighbor relationships on a Cisco router?
Answer
The command to show OSPF neighbor relationships is "show ip ospf neighbor."
Question
What does EIGRP stand for and what type of protocol is it?
Answer
EIGRP stands for Enhanced Interior Gateway Routing Protocol, and it is a distance-vector routing protocol.
Question
What command is used to enable BGP on a Cisco router?
Answer
The command used to enable BGP on a Cisco router is "router bgp [AS number]."
Question
What is the recommended practice for assigning IPv6 addresses to devices in an enterprise network?
Answer
Use Stateless Address Autoconfiguration (SLAAC) combined with DHCPv6 where necessary to streamline address assignment.
Question
What prefix length is commonly used for IPv6 subnets in enterprise networks?
Answer
A /64 prefix length is typically recommended for each subnet to allow adequate address space and support for various IPv6 features.
Question
Which protocol is preferred for routing IPv6 in enterprise networks?
Answer
OSPFv3 (Open Shortest Path First version 3) and EIGRP for IPv6 are commonly used routing protocols for efficient IPv6 routing.
Question
What security considerations should be taken into account when deploying IPv6?
Answer
Implement IPv6 Access Control Lists (ACLs), utilize IPsec for secure communication, and regularly update network security policies to address IPv6 threats.
Question
How can enterprises ensure effective management of IPv6 addressing?
Answer
Utilize an IPv6 address management (IPAM) tool to track and manage the allocation and usage of IPv6 addresses in a structured manner.
Question
What is the purpose of BGP in enterprise networks?
Answer
The purpose of BGP (Border Gateway Protocol) in enterprise networks is to provide inter-domain routing between different autonomous systems, allowing for effective routing decisions and optimization of network paths.
Question
What command is used to enter BGP configuration mode on a Cisco router?
Answer
The command used to enter BGP configuration mode on a Cisco router is `router bgp [AS-number]`, where [AS-number] is the autonomous system number.
Question
What is the default BGP timer for keepalives?
Answer
The default BGP timer for keepalives is 60 seconds.
Question
What mechanism does BGP use to prevent routing loops?
Answer
BGP uses the AS-path attribute to prevent routing loops by keeping a record of the autonomous systems that a route has traversed.
Question
What is the purpose of route reflectors in BGP?
Answer
The purpose of route reflectors in BGP is to reduce the number of required peer connections in a BGP mesh network, allowing for more scalable and efficient routing updates among internal BGP peers.
Question
What is the purpose of High Availability in networking?
Answer
High Availability ensures that network services remain accessible and operational, even in the event of failures or issues within network components.
Question
Which routing protocol offers built-in support for load balancing and route redundancy?
Answer
Enhanced Interior Gateway Routing Protocol (EIGRP) offers built-in support for load balancing and route redundancy, allowing multiple equal-cost paths.
Question
What is the function of HSRP in a high availability design?
Answer
Hot Standby Router Protocol (HSRP) allows multiple routers to work together to provide virtual redundancy, ensuring that if the active router fails, another router can take over without disruption.
Question
How does OSPF contribute to network redundancy?
Answer
Open Shortest Path First (OSPF) contributes to network redundancy by allowing multiple paths to the same destination, enabling automatic rerouting if one path fails.
Question
What is the role of redundancy groups in GlusterFS for high availability?
Answer
Redundancy groups in GlusterFS replicate data across multiple servers to provide fault tolerance and maintain data availability in case one node fails.
Question
What is the purpose of the EIGRP feasible distance?
Answer
The feasible distance is the lowest calculated metric to the destination from the perspective of a router in EIGRP.
Question
What command is used to verify EIGRP neighbors on a Cisco router?
Answer
The command is "show ip eigrp neighbors."
Question
What does OSPF use to elect the designated router on a multi-access network?
Answer
OSPF uses a priority value assigned to each router to elect the designated router.
Question
What are the two main categories of routing protocols?
Answer
The two main categories are distance vector and link-state routing protocols.
Question
Which parameter is used in OSPF to determine the cost to a destination?
Answer
The cost in OSPF is determined by the interface bandwidth.
Question
What is the primary purpose of Protocol Independent Multicast (PIM)?
Answer
The primary purpose of PIM is to enable efficient multicast routing in a network by allowing for the distribution of multicast data without being dependent on the underlying unicast routing protocol.
Question
What does IGMP stand for, and what is its role in multicast routing?
Answer
IGMP stands for Internet Group Management Protocol, and its role is to manage the membership of hosts in multicast groups, allowing routers to know which multicast groups are of interest to which hosts.
Question
What are the two primary modes of PIM operation?
Answer
The two primary modes of PIM operation are PIM Sparse Mode (PIM-SM) and PIM Dense Mode (PIM-DM).
Question
In multicast routing, what is a multicast group?
Answer
A multicast group is a set of hosts that have joined a specific multicast address to receive the same data stream simultaneously.
Question
How does a router determine whether to forward multicast traffic?
Answer
A router determines whether to forward multicast traffic based on IGMP messages received from hosts and the multicast routing table, which indicates group memberships and the appropriate upstream link for the multicast data.
Question
What does EIGRP stand for?
Answer
Enhanced Interior Gateway Routing Protocol
Question
What are the two types of EIGRP metrics?
Answer
Bandwidth and Delay
Question
What is the default administrative distance of EIGRP internal routes?
Answer
90
Question
What protocol does EIGRP use to establish neighbor relationships?
Answer
Reliable Transport Protocol (RTP)
Question
What command displays the EIGRP topology table?
Answer
show ip eigrp topology
Question
What is a site-to-site VPN?
Answer
A site-to-site VPN is a secure connection between two networks over the internet, enabling communication and resource sharing between remote offices or locations.
Question
What protocol is commonly used for securing site-to-site VPN connections?
Answer
IPsec (Internet Protocol Security) is commonly used to secure site-to-site VPN connections by providing confidentiality, integrity, and authentication.
Question
What distinguishes a remote access VPN from a site-to-site VPN?
Answer
A remote access VPN allows individual users to connect securely to a corporate network from a remote location, while a site-to-site VPN connects entire networks to each other.
Question
Which VPN technology uses a client application to establish a connection to the VPN server?
Answer
Remote access VPN technology typically uses a client application on the user's device to establish a connection to the VPN server.
Question
What security features are generally provided by VPN solutions?
Answer
VPN solutions typically provide encryption, authentication, and integrity checks to secure data as it travels across the internet.
Question
What is the primary purpose of implementing EIGRP for IPv6?
Answer
The primary purpose of implementing EIGRP for IPv6 is to enable dynamic routing within an IPv6 network, allowing routers to share information about network reachability and facilitate efficient data packet routing.
Question
What are the key attributes that EIGRP uses to calculate the best path to a destination?
Answer
EIGRP uses several key attributes to calculate the best path, including bandwidth, delay, load, reliability, and Maximum Transmission Unit (MTU).
Question
What type of protocol is OSPF, and how does it determine the best route?
Answer
OSPF (Open Shortest Path First) is a link-state routing protocol that determines the best route by constructing a complete view of the network topology using the Shortest Path First (SPF) algorithm.
Question
How does BGP handle routing policy?
Answer
BGP (Border Gateway Protocol) handles routing policy through the use of attributes such as AS-path, next-hop, local preference, and community, allowing network administrators to influence route selection based on their specific policies.
Question
What feature of HSRP provides network redundancy for a group of routers?
Answer
Hot Standby Router Protocol (HSRP) provides network redundancy by allowing multiple routers to work together to present a single virtual IP address, ensuring high availability in case one of the routers fails.
Question
What is a common method to secure OSPF from external attacks?
Answer
Implementing OSPF authentication using hello and link-state update packets.
Question
Which protocol can be used to secure BGP sessions between routers?
Answer
Using MD5 authentication for BGP peer sessions.
Question
What is the purpose of using route filters in routing protocols?
Answer
To control the distribution of routing information and prevent unwanted routes from being accepted.
Question
How can DNS vulnerabilities impact routing protocols?
Answer
Malicious DNS responses can lead to incorrect routing decisions or redirect traffic.
Question
What should be implemented on routers to prevent unauthorized access?
Answer
Configure access control lists (ACLs) and use secure management protocols like SSH instead of Telnet.
Question
What is the purpose of BGP in a network?
Answer
BGP (Border Gateway Protocol) is used to exchange routing information between different autonomous systems on the internet, enabling policy-based routing and controlling traffic flow.
Question
What command displays BGP neighbor status?
Answer
The command 'show ip bgp summary' displays the status of BGP neighbors and various BGP-related statistics.
Question
What are the two main types of BGP?
Answer
The two main types of BGP are External BGP (EBGP), used for routing between different autonomous systems, and Internal BGP (IBGP), used for routing within the same autonomous system.
Question
What is path vector protocol in the context of BGP?
Answer
Path vector protocol refers to BGP's method of maintaining the path information that gets updated dynamically as the network topology changes, including the list of AS numbers that a route has traversed.
Question
What does the 'weight' attribute do in BGP?
Answer
The 'weight' attribute is a local Cisco-specific value used to influence outbound traffic from a router; routes with a higher weight are preferred over others.
Question
What is the primary purpose of Quality of Service (QoS) in networking?
Answer
The primary purpose of Quality of Service (QoS) in networking is to manage network traffic and ensure optimal performance by prioritizing certain types of traffic over others.
Question
What are the main types of QoS mechanisms used in Cisco networks?
Answer
The main types of QoS mechanisms used in Cisco networks include classification and marking, queuing, congestion management, and traffic shaping.
Question
How does traffic classification work in QoS?
Answer
Traffic classification in QoS involves identifying and categorizing packets based on predefined criteria, such as source IP address, destination IP address, application type, or protocols, to apply appropriate QoS policies.
Question
What role does queuing play in QoS configurations?
Answer
Queuing in QoS configurations provides a way to manage packet transmission by defining how packets are stored, prioritized, and sent out of an interface, helping to reduce packet loss during congestion.
Question
What is the significance of traffic shaping in QoS?
Answer
Traffic shaping in QoS is important because it controls the amount of traffic sent into the network, ensuring that the data flow conforms to specified bandwidth limits and minimizes congestion and delays.
Question
What is the primary purpose of EIGRP in a network?
Answer
The primary purpose of EIGRP (Enhanced Interior Gateway Routing Protocol) is to provide efficient routing by maintaining optimal routes within an autonomous system and enabling fast convergence.
Question
What are the main components of EIGRP's composite metric?
Answer
The main components of EIGRP's composite metric are bandwidth, delay, load, reliability, and MTU (Maximum Transmission Unit).
Question
What does "K values" in EIGRP represent?
Answer
"K values" in EIGRP represent the weights assigned to each metric component (bandwidth, delay, load, and reliability) used to calculate the composite metric.
Question
What command is used to enable EIGRP routing on a Cisco router?
Answer
The command used to enable EIGRP routing on a Cisco router is "router eigrp [AS_number]".
Question
What is the default administrative distance for EIGRP?
Answer
The default administrative distance for EIGRP is 90 for internal routes and 170 for external routes.
Question
What is the purpose of DHCP in an enterprise network?
Answer
DHCP (Dynamic Host Configuration Protocol) provides automatic IP address allocation and configuration for devices on a network, reducing the need for manual IP management.
Question
What information does DNS provide in a network environment?
Answer
DNS (Domain Name System) translates human-readable domain names into IP addresses, allowing users to access websites and services without needing to remember numeric addresses.
Question
What is the role of NAT in an enterprise network?
Answer
NAT (Network Address Translation) allows multiple devices on a local network to share a single public IP address, enhancing security and conserving the number of IP addresses used.
Question
What command can be used to display the current DHCP bindings on a Cisco router?
Answer
The command "show ip dhcp binding" is used to display the current DHCP leases and bindings on a Cisco router.
Question
How can DNS caching improve network performance?
Answer
DNS caching stores previously resolved domain name queries on local DNS servers or client machines, reducing the time it takes to resolve subsequent requests and minimizing external DNS queries.
Question
What command is used to display the routing table on a Cisco router?
Answer
The command used is 'show ip route'.
Question
What are the main benefits of implementing OSPF over EIGRP?
Answer
OSPF offers faster convergence, supports large networks, and is a standard routing protocol.
Question
What are the three main OSPF router types?
Answer
The three main OSPF router types are Internal Routers, Backbone Routers, and Area Border Routers.
Question
Which OSPF command is used to configure a router's priority?
Answer
The command used is 'ip ospf priority'.
Question
What does the 'EIGRP Successor' represent in a routing environment?
Answer
The 'EIGRP Successor' represents the primary route to a destination with the lowest metric.
Question
What is the purpose of using Python in network automation?
Answer
Python is used in network automation to write scripts that can configure devices, collect data, and manage network operations efficiently and programmatically.
Question
What role does Ansible play in routing automation?
Answer
Ansible automates network configuration and management through a simple, agentless model, allowing for efficient deployment of routing changes and infrastructure as code.
Question
What is a key benefit of leveraging Cisco APIs for automation?
Answer
Cisco APIs enable integration with various third-party tools and custom applications, facilitating seamless automation and orchestration of networking tasks.
Question
How can REST APIs enhance network programmability?
Answer
REST APIs provide a standardized interface for interacting with network devices, enabling easy integration and automation through common methods like GET, POST, PUT, and DELETE.
Question
Which Python library is commonly used for network automation?
Answer
The Netmiko library is commonly used for network automation, providing simplified SSH communication with network devices for configuration and management tasks.
Question
What routing protocol uses the concept of areas?
Answer
OSPF (Open Shortest Path First) uses the concept of areas to manage routing information and optimize performance.
Question
What two types of OSPF networks are identified for area boundaries?
Answer
Backbone area (Area 0) and Non-backbone areas.
Question
Which command can be used to verify OSPF neighbor adjacency?
Answer
The command "show ip ospf neighbor" can be used to verify OSPF neighbor adjacency.
Question
What is the purpose of the OSPF Designated Router (DR)?
Answer
The OSPF Designated Router (DR) minimizes routing updates in multi-access networks by serving as the primary point for exchanging routing information.
Question
What does EIGRP stand for?
Answer
EIGRP stands for Enhanced Interior Gateway Routing Protocol.
Question
What are two commonly used tools for troubleshooting routing issues in complex networks?
Answer
Ping and Traceroute.
Question
What method can help identify routing loops in a network?
Answer
Analyzing routing table updates and using debug commands.
Question
Which command can be used to display the current routing table on a Cisco router?
Answer
show ip route.
Question
What is the purpose of using the 'debug ip routing' command?
Answer
To provide real-time updates on routing table changes and protocols.
Question
What is a key indicator of a misconfigured static route?
Answer
Traffic not being routed as expected or reaching the wrong next hop.
Question
What is the default OSPF administrative distance?
Answer
110
Question
What command is used to display OSPF neighbors?
Answer
show ip ospf neighbor
Question
What feature of EIGRP allows it to maintain a loop-free environment?
Answer
Diffusing Update Algorithm (DUAL)
Question
What is the purpose of route redistribution in routing protocols?
Answer
To allow different routing protocols to share routes with one another.
Question
Which command is used to configure a static route on a Cisco router?
Answer
ip route <destination_network> <subnet_mask> <next_hop_ip>
Question
What is a key advantage of MPLS in WAN connectivity?
Answer
MPLS provides traffic engineering capabilities, enabling efficient bandwidth utilization and reliable delivery of service-level agreements (SLAs).
Question
Which WAN protocol uses a leased line for point-to-point connectivity?
Answer
Point-to-Point Protocol (PPP) is a WAN protocol commonly used for point-to-point connections over leased lines.
Question
What is the main purpose of Frame Relay in WAN technologies?
Answer
Frame Relay is used for connecting local area networks (LANs) and providing a cost-effective way to connect multiple sites over wide area networks (WANs).
Question
What does the term "VPLS" stand for in WAN technologies?
Answer
VPLS stands for Virtual Private LAN Service, which allows multiple sites to connect to a single Layer 2 VPN, behaving as if they are on the same local network.
Question
Which protocol can provide high availability and fast convergence in WANs by employing multiple paths?
Answer
Enhanced Interior Gateway Routing Protocol (EIGRP) can provide high availability and fast convergence through its support for multiple equal-cost paths.
Question
What protocol is used for routing in an MPLS network?
Answer
Label Distribution Protocol (LDP)
Question
What feature in EIGRP allows for load balancing across unequal paths?
Answer
EIGRP variance
Question
What command would you use to view the OSPF database?
Answer
show ip ospf database
Question
Which IPv6 addressing type is used for a single host?
Answer
Unicast
Question
What is the purpose of the prefix-list in BGP?
Answer
To filter routing updates based on specific prefix criteria
Question
What is a hybrid cloud environment?
Answer
A hybrid cloud environment is a computing setup that combines on-premises infrastructure with public and/or private cloud services, allowing for data and application portability.
Question
What are common routing protocols utilized in cloud environments?
Answer
Common routing protocols in cloud environments include BGP (Border Gateway Protocol) for inter-domain routing and OSPF (Open Shortest Path First) for intra-domain routing.
Question
What is the purpose of Direct Connect in AWS?
Answer
AWS Direct Connect provides a dedicated network connection from the on-premises data center to AWS, improving bandwidth and lowering latency for data transfer.
Question
How does a Virtual Private Cloud (VPC) enhance security in cloud environments?
Answer
A Virtual Private Cloud (VPC) enhances security by allowing users to create a logically isolated section of the cloud where they can define their own network configuration, including IP address range, subnets, and routing rules.
Question
What is the role of VPNs in hybrid cloud connectivity?
Answer
VPNs (Virtual Private Networks) provide secure, encrypted connections between on-premises networks and cloud environments, ensuring data privacy and integrity during transfer.
Question
What is the purpose of the OSPF protocol?
Answer
OSPF is used for routing IP packets within a single routing domain, allowing routers to exchange information about network topology and reachability.
Question
What is the default area for OSPF routers when none is defined?
Answer
The default area for OSPF routers when none is defined is Area 0, also known as the Backbone area.
Question
What command is used to display OSPF neighbors?
Answer
The command used to display OSPF neighbors is "show ip ospf neighbor."
Question
What metric does EIGRP use to determine the best path?
Answer
EIGRP uses a composite metric based on bandwidth, delay, load, and reliability to determine the best path.
Question
Which routing protocol uses the concept of a Designated Router (DR)?
Answer
OSPF uses the concept of a Designated Router (DR) to reduce the amount of routing information sent over broadcast networks.
Question
What is the primary purpose of SD-WAN?
Answer
The primary purpose of SD-WAN is to optimize and manage WAN connections while improving performance, reliability, and cost-efficiency for enterprise applications.
Question
What technology does SD-WAN use to improve application performance?
Answer
SD-WAN utilizes application-aware routing, which dynamically directs traffic based on real-time network performance and the specific needs of applications.
Question
What are common benefits of implementing SD-WAN?
Answer
Common benefits of implementing SD-WAN include reduced operational costs, increased agility, improved application performance, and enhanced security features.
Question
What protocols are typically used in SD-WAN communication?
Answer
SD-WAN communication typically uses protocols such as Border Gateway Protocol (BGP) and Virtual Extensible LAN (VXLAN) for efficient routing and encapsulation of traffic.
Question
What is a key difference between traditional WAN and SD-WAN?
Answer
A key difference is that traditional WAN often relies on dedicated MPLS circuits, while SD-WAN can leverage multiple transport methods including broadband Internet, LTE, and MPLS, providing more flexible and cost-effective options.
Question
What is automation in networking?
Answer
Automation in networking refers to the use of software and tools to perform network management tasks without human intervention, increasing efficiency and reducing errors.
Question
What are the benefits of automating network tasks?
Answer
Benefits of automating network tasks include increased operational efficiency, faster deployment of services, improved consistency, reduced human error, and enhanced scalability.
Question
What is a common protocol used for network automation?
Answer
Netconf is a common protocol used for network automation that enables the management of network devices through a standard interface for configuration and monitoring.
Question
Which programming languages are often used for network automation?
Answer
Python and Ansible are often used for network automation due to their simplicity and extensive libraries for networking tasks.
Question
What is the purpose of a network controller in automation?
Answer
The purpose of a network controller in automation is to centralize the management of network resources, allowing for the orchestration and configuration of devices through programmable interfaces.
Question
What is Cisco DNA Center?
Answer
Cisco DNA Center is a centralized network management and automation platform that provides a holistic view of the network for Cisco devices.
Question
What are the key functionalities of Cisco DNA Center?
Answer
Key functionalities include network automation, policy-based management, assurance and analytics, and application performance monitoring.
Question
How does Cisco DNA Center enable automation in network management?
Answer
Cisco DNA Center enables automation through features like automation of device provisioning, configuration management, and lifecycle management.
Question
What is the role of Cisco DNA Center in network assurance?
Answer
Cisco DNA Center ensures network assurance by providing insights into network health, performance monitoring, and troubleshooting capabilities.
Question
What protocols does Cisco DNA Center primarily support for communication with devices?
Answer
Cisco DNA Center primarily supports REST APIs, NETCONF, and gRPC for communication with network devices.
Question
What is programmability in Cisco solutions?
Answer
Programmability in Cisco solutions refers to the ability to automate and manage network devices, services, and operations through software tools, APIs, and programming languages, enhancing efficiency and flexibility.
Question
What are some common programming languages used in Cisco solutions?
Answer
Common programming languages used in Cisco solutions include Python, JavaScript, and Go, which facilitate automation and orchestration tasks.
Question
What role do APIs play in Cisco programmability?
Answer
APIs (Application Programming Interfaces) enable interaction between different software applications and network devices, allowing for automation, data retrieval, and management capabilities.
Question
What is the Cisco DevNet?
Answer
Cisco DevNet is a developer program and community that provides resources, tools, and support for developers to create applications and automate Cisco solutions through APIs and other programmability technologies.
Question
What benefits does programmability offer in enterprise networking?
Answer
Programmability offers benefits such as increased operational efficiency, reduced manual configuration errors, improved scalability, and enhanced ability to respond to business needs quickly.
Question
What does REST stand for in the context of APIs?
Answer
Representational State Transfer
Question
What is the primary purpose of REST APIs in network automation?
Answer
To provide a standardized way for applications to communicate over the web, allowing for automation and management of network devices.
Question
What are the key constraints of RESTful architecture?
Answer
Statelessness, cacheability, layered system, uniform interface, and optionally code on demand.
Question
Which HTTP methods are commonly used with REST APIs?
Answer
GET, POST, PUT, DELETE, and PATCH.
Question
How can REST APIs enhance the scalability of network solutions?
Answer
By allowing distributed systems to interact without needing to manage state on the server, thus facilitating load distribution and reducing resource overhead.
Question
What programming language is commonly used for network automation in Cisco environments?
Answer
Python
Question
What library in Python is used for making HTTP requests in network automation?
Answer
Requests
Question
Which Python library is popular for parsing and manipulating JSON data received from network devices?
Answer
json
Question
What function in Python can be used to establish an SSH connection to network devices for automation?
Answer
paramiko.connect()
Question
What tool in Python allows network engineers to interact with REST APIs for automation tasks?
Answer
Postman or Python libraries like Requests or HTTP.client
Question
What does YANG stand for in the context of data modeling?
Answer
Yet Another Next Generation
Question
What protocol is commonly used to manage and retrieve YANG data models on network devices?
Answer
NETCONF
Question
What is the primary purpose of YANG data models?
Answer
To define the structure and constraints of data used for configuration and management of network devices.
Question
In which format does NETCONF primarily transport YANG data?
Answer
XML (Extensible Markup Language)
Question
What HTTP-based replacement protocol can be used alongside YANG and NETCONF?
Answer
RESTCONF
Question
What is Cisco Modeling Labs (CML)?
Answer
Cisco Modeling Labs (CML) is a network simulation tool that allows users to design, simulate, and visualize complex networks for testing and validation purposes.
Question
What operating systems are supported by Cisco Modeling Labs?
Answer
Cisco Modeling Labs supports various Cisco operating systems, including IOS, IOS XE, and NX-OS.
Question
What is the primary use of Cisco Modeling Labs in network design?
Answer
The primary use of Cisco Modeling Labs is to create virtual network topologies to test configurations and applications before deploying them in a physical environment.
Question
How do users access Cisco Modeling Labs?
Answer
Users can access Cisco Modeling Labs through a client interface, typically via a web-based GUI, where they can create, modify, and manage their network simulations.
Question
What is the key benefit of using Cisco Modeling Labs for network engineers?
Answer
The key benefit of using Cisco Modeling Labs is the ability to conduct extensive testing and troubleshooting in a controlled virtual environment without impacting production networks.
Question
What is Ansible primarily used for in Cisco environments?
Answer
Ansible is primarily used for network automation, configuration management, and orchestration in Cisco environments.
Question
What file format does Ansible use to define playbooks?
Answer
Ansible uses YAML (Yet Another Markup Language) file format to define playbooks.
Question
What command is used to run an Ansible playbook?
Answer
The command used to run an Ansible playbook is `ansible-playbook`.
Question
Which Ansible module is commonly used for managing Cisco IOS devices?
Answer
The `ios_config` module is commonly used for managing Cisco IOS devices.
Question
What is the purpose of the inventory file in Ansible?
Answer
The inventory file in Ansible is used to define and manage the hosts and groups of hosts that Ansible will target during automation tasks.
Question
What is Cisco IOS XE?
Answer
Cisco IOS XE is a network operating system based on Linux that provides a modular architecture for devices, enabling advanced system features and programmability.
Question
Which command is used to check the version of Cisco IOS XE running on a device?
Answer
The command `show version` can be used to check the version of Cisco IOS XE.
Question
What are the benefits of using REST APIs in Cisco IOS XE?
Answer
REST APIs in Cisco IOS XE allow for simplified integration, interoperability with existing tools, and enhanced automation capabilities for network management.
Question
What is the purpose of the gRPC protocol in Cisco IOS XE?
Answer
The gRPC protocol in Cisco IOS XE facilitates efficient communication between applications and devices, supporting real-time network telemetry and configuration management.
Question
Which feature allows for the configuration of devices using Python scripts in Cisco IOS XE?
Answer
The Embedded Event Manager (EEM) feature enables the execution of Python scripts for automating configuration tasks and event-driven actions in Cisco IOS XE.
Question
What is Git primarily used for in configuration management?
Answer
Git is primarily used for version control, allowing teams to track changes in configuration files and manage updates over time.
Question
What does CI/CD stand for in the context of DevOps?
Answer
CI/CD stands for Continuous Integration and Continuous Deployment, which are practices aimed at automating the software development lifecycle.
Question
What is a common benefit of using Git in network automation?
Answer
A common benefit of using Git in network automation is the ability to collaborate effectively by enabling multiple team members to work on configurations simultaneously without overwriting each other's changes.
Question
What is the role of a CI/CD pipeline in configuration management?
Answer
The role of a CI/CD pipeline in configuration management is to automate the process of testing, building, and deploying changes to configuration files in a controlled and efficient manner.
Question
How can you revert a change in Git?
Answer
You can revert a change in Git using the `git revert` command to create a new commit that undoes the changes made by a previous commit.
Question
What tools can be used for monitoring automated networks?
Answer
Tools such as Cisco DNA Center, Cisco vManage, and SolarWinds can be used for monitoring automated networks.
Question
What is the purpose of Cisco DNA Assurance?
Answer
Cisco DNA Assurance provides insights into network performance, user experiences, and the health of devices, enabling proactive monitoring and troubleshooting.
Question
Which protocol is commonly used for network automation and monitoring?
Answer
NETCONF is a protocol commonly used for network automation and monitoring in automated networks.
Question
How can alerts be configured for network issues in automated networks?
Answer
Alerts can be configured using platforms like Cisco DNA Center or network management tools, which can send notifications based on predefined thresholds or events.
Question
What role does telemetry play in monitoring automated networks?
Answer
Telemetry allows for real-time data collection from network devices, providing visibility into performance metrics and aiding in troubleshooting.
Question
What is the primary security concern when implementing automated network changes?
Answer
The primary security concern is the potential for unauthorized access or changes to the network configuration, which can lead to vulnerabilities or breaches.
Question
Which protocol is commonly used for secure remote device management in network automation?
Answer
Secure Shell (SSH) is commonly used for secure remote device management in network automation.
Question
What role does version control play in network automation security?
Answer
Version control helps track changes and manage configurations, reducing the risk of unauthorized modifications and ensuring that changes can be audited and rolled back if necessary.
Question
What is a common method to secure sensitive information in automation scripts?
Answer
A common method is to use encryption or secure storage solutions for sensitive information such as passwords and API keys within automation scripts.
Question
Why is implementing least privilege access important in network automation?
Answer
Implementing least privilege access minimizes the risk of exposure by ensuring that automated processes and users only have the permissions necessary to perform their required tasks, reducing the potential impact of a compromise.
Question
What is service telemetry in the context of Cisco networking?
Answer
Service telemetry refers to the automated collection and reporting of data related to network performance and state, which allows for real-time monitoring and analysis of network services.
Question
What protocol is commonly used for streaming telemetry in Cisco devices?
Answer
The Protocol Buffers (protobuf) are commonly used for streaming telemetry in Cisco devices, enabling efficient data serialization.
Question
What is the primary benefit of implementing streaming telemetry over traditional polling methods?
Answer
The primary benefit of streaming telemetry is the ability to receive real-time data updates continuously, reducing latency and network congestion compared to traditional polling.
Question
What command is used to enable telemetry on a Cisco IOS XE device?
Answer
The command used to enable telemetry on a Cisco IOS XE device is "telemetry model-driven".
Question
Which telemetry format is primarily used to transmit data from Cisco devices?
Answer
The telemetry format primarily used to transmit data from Cisco devices is JSON (JavaScript Object Notation) or gRPC (gRPC Remote Procedure Calls).
Question
What is an Application Programming Interface (API)?
Answer
An API is a set of rules and protocols for building and interacting with software applications, allowing different systems to communicate with each other.
Question
What are RESTful APIs?
Answer
RESTful APIs are web services that adhere to the principles of Representational State Transfer (REST), using standard HTTP methods for communication.
Question
What is the purpose of a JSON payload in an API request?
Answer
A JSON payload is used to send structured data in an API request, allowing the client to communicate specific information in a format that the server can easily parse and use.
Question
What command is commonly used to test API endpoints from the command line?
Answer
The command `curl` is commonly used to test API endpoints from the command line.
Question
What tool can be utilized for API testing that provides a graphical user interface?
Answer
Postman is a popular tool that provides a graphical user interface for API testing, allowing users to send requests and view responses easily.
Question
What is a common use case for automation in enterprise network environments?
Answer
Streamlining device configuration management to reduce errors and improve efficiency.
Question
How does network automation improve incident response times?
Answer
By enabling automated scripts and tools to quickly identify and resolve network issues without manual intervention.
Question
What role does API integration play in network automation?
Answer
API integration allows different network devices and services to communicate and automate workflows, improving interoperability and efficiency.
Question
What is one benefit of using orchestration in a network automation strategy?
Answer
Orchestration helps manage complex tasks across multiple devices and systems, ensuring coordinated operation and reducing operational overhead.
Question
How can automation enhance the security posture of an enterprise network?
Answer
By automating security updates and configurations, networks can better mitigate vulnerabilities and respond to threats in real-time.