CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7: Routing Essentials and EIGRP Exam Answers Full 100% 2024

  1. Which type of routing protocol uses LSAs and TLVs to support extended features?

    • link-state
    • hybrid
    • distance vector
    • path vector
      Answers Explanation & Hints:

      Link-state routing protocols include capabilities such as LSAs for OSPF and TLVs (type/length/value) for IS-IS that allow them to support extended features.

  2. What are two characteristics of link-state routing protocols? (Choose two.)

    • They use more CPU and memory resources than distance vector protocols do.
    • They provide routers with a synchronized identical map of the network.
    • They use path attributes to determine the best loop-free path.
    • They periodically send full routing table updates to directly connected neighbors.
    • They can load balance across unequal metric cost paths.
      Answers Explanation & Hints:

      Link-state protocols like OSPF and ISIS use more CPU and memory resources than distance vector protocols do because they maintain a complete synchronized map of the network and run the SPF algorithm to determine the best path.

  3. What data is used by OSPF and ISIS for loop prevention?

    • a synchronized map of the network
    • hop count to the destination
    • autonomous system path to the destination
    • feasible distance calculation to the destination
      Answers Explanation & Hints:

      OSPF and ISIS are link-state routing protocols. As link-state routing protocols they have a synchronized and identical map of the network. Using the complete map of the network, every router in the network then runs the Dijkstra shortest path first (SPF) algorithm to calculate the best shortest loop-free paths.

  4. Which routing protocol incorporates characteristics of both distance vector and link-state protocols?

    • EIGRP
    • ISIS
    • iBGP
    • EBGP
      Answers Explanation & Hints:

      As a hybrid routing protocol, EIGRP incorporates the characteristics of both distance vector and link-state protocols. It uses bandwidth and other metrics rather than hop count to determine the best path and this information is advertised to all neighbors.

  5. How do EIGRP routers establish and maintain neighbor relationships?

    • by exchanging neighbor tables with directly attached routers
    • by comparing known routes to information received in updates
    • by exchanging hello packets with neighboring routers
    • by dynamically learning new routes from neighbors
    • by exchanging routing tables with directly attached routers
      Answers Explanation & Hints:

      EIGRP uses hello messages to establish and maintain neighbor relationships.

  6. A router has installed several routes into the routing table. How will the router determine which route to use to forward packets?

    • the longest prefix match
    • the highest metric
    • the lowest metric
    • the lowest administrative distance
      Answers Explanation & Hints:

      The route chosen for forwarding a packet is the route with the longest prefix length matching the destination network of the packet. The metric and administrative distance are used to determine which routes will appear in the routing table.

  7. What is the effect of configuring the ipv6 unicast-routing command on a router?

    • to assign the router to the all-nodes multicast group
    • to enable the router as an IPv6 router
    • to permit only unicast packets on the router
    • to prevent the router from joining the all-routers multicast group
      Answers Explanation & Hints:

      When the ipv6 unicast-routing command is implemented on a router, it enables the router as an IPv6 router. Use of this command also assigns the router to the all-routers multicast group.

  8. Why would a floating static route be configured with an administrative distance that is higher than the administrative distance of a dynamic routing protocol that is running on the same router?

    • to be used as a backup route
    • to load-balance the traffic
    • to act as a gateway of last resort
    • to be the priority route in the routing table
      Answers Explanation & Hints:

      By default, dynamic routing protocols have a higher administrative distance than static routes. Configuring a static route with a higher administrative distance than that of the dynamic routing protocol will result in the dynamic route being used instead of the static route. However, should the dynamically learned route fail, then the static route will be used as a backup.

  9. Which static route statement shows a recursive IPv6 static route?

    • ipv6 route 0::/0 S0/0/0
    • ipv6 route 0::/0 S0/0/0 254
    • ipv6 route 2001:db8:cafe:1::/56 S0/0/0
    • ipv6 route 2001:db8:cafe:1::/56 2001:db8:1000:10::1
    • ipv6 route 2001:db8:cafe:1::/56 S0/0/0 2001:db8:1000:10::1
      Answers Explanation & Hints:

      In a recursive static route, only the next-hop IPv6 address is specified. As a consequence, the router must perform a recursive route table lookup to find an exit interface associated with the network of the IPv6 address.

  10. Refer to the exhibit. Which command will properly configure an IPv6 static route on R2 that will allow traffic from PC2 to reach PC1 without any recursive lookups by router R2?

    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 01
    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 01
    • R2(config)# ipv6 route 2001:db8:10:12::/64 2001:db8:32::1
    • R2(config)# ipv6 route 2001:db8:10:12::/64 S0/0/0
    • R2(config)# ipv6 route ::/0 2001:db8:32::1
    • R2(config)# ipv6 route 2001:db8:10:12::/64 S0/0/1
      Answers Explanation & Hints:

      A nonrecursive route must have an exit interface specified from which the destination network can be reached. In this example 2001:db8:10:12::/64 is the destination network and R2 will use exit interface S0/0/0 to reach that network. Therefore, the static route would be ipv6 route 2001:db8:10:12::/64 S0/0/0.

  11. Refer to the exhibit. Router R1 has an OSPF neighbor relationship with the ISP router over the 192.168.0.32 network. The 192.168.0.36 network link should serve as a backup when the OSPF link goes down. The floating static route command ip route 0.0.0.0 0.0.0.0 S0/0/1 100 was issued on R1 and now traffic is using the backup link even when the OSPF link is up and functioning. Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?​

    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 04
    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 04
    • Add the next hop neighbor address of 192.168.0.36.
    • Change the administrative distance to 1.
    • Change the destination network to 192.168.0.34.
    • Change the administrative distance to 120.
      Answers Explanation & Hints:

      The problem with the current floating static route is that the administrative distance is set too low. The administrative distance will need to be higher than that of OSPF, which is 110, so that the router will only use the OSPF link when it is up.

  12. What is used by BGP to guarantee a loop free path to reach a destination?

    • a record of each autonomous system that a routing advertisement has traversed
    • a distance calculation based on cumulative delay and minimum bandwidth
    • the count of router hops to reach a destination
    • the cumulative cost as measured in bandwidth
      Answers Explanation & Hints:

      BGP is a path vector protocol which uses several path attributes to determine the best path. To prevent loops BGP updates include a record of each autonomous system that the routing advertisement traversed. A BGP router that receives the update should not see its own AS in the AS Path. If it did, it would indicate a loop.

  13. What is the purpose for creating VRFs on a router?

    • to isolate paths
    • to prevent routing loops
    • to determine the vector to reach a destination network
    • to keep a record of all autonomous systems that routing advertisements have traversed
      Answers Explanation & Hints:

      Virtual routing and forwarding, or VRF, is a technology that creates several separate virtual routers on a single physical router. Each of the virtual routers acts as an independent and separate router so that their paths are isolated from each other.

  14. Which technology creates segmentation between network interfaces, IP addresses, and routing tables?

    • virtual routing and forwarding
    • virtual LANs
    • multiprotocol label switching
    • virtual router redundancy protocol
      Answers Explanation & Hints:

      Virtual routing and forwarding, or VRF, is a technology that creates several separate virtual routers on a single physical router. Each of the virtual routers acts as an independent and separate router so that their paths are isolated from each other.

  15. What is the administrative distance of an IS-IS route?

    • 115
    • 170
    • 110
    • 90
    • Explanation & Hints:

      The administrative distance of an IS-IS (Intermediate System to Intermediate System) route is 115.

      Explanation:

      Administrative distance is a value used by routers to select the best path when there are two or more different routes to the same destination from two different routing protocols. It’s essentially a measure of the trustworthiness of the source of the routing information, with lower values being preferred over higher values.

      IS-IS (Intermediate System to Intermediate System) is a routing protocol designed to move information efficiently within a computer network, a group of physically connected computers or similar devices. It is widely used in large networks, particularly within service provider environments.

      The administrative distance for IS-IS is set to 115 by default on most routing devices. This is compared to other routing protocols like OSPF (Open Shortest Path First) which has a default administrative distance of 110, EIGRP (Enhanced Interior Gateway Routing Protocol) which is 90 for internal routes, and BGP (Border Gateway Protocol) which is 20 for external routes and 200 for internal routes. The administrative distance is a crucial factor in route selection, with the route having the lowest administrative distance being preferred if multiple routes exist to the same destination.

  16. What is the administrative distance of an internal EIGRP route?

    • 90
    • 110
    • 115
    • 20
    • Explanation & Hints:

      The administrative distance of an internal EIGRP (Enhanced Interior Gateway Routing Protocol) route is:

      • 90

      Explanation:

      Administrative distance is a metric used by routers to choose the best path when there are multiple routes to the same destination from different routing sources. It represents the reliability or trustworthiness of the route, with lower values indicating more preferred routes.

      EIGRP, developed by Cisco, is an advanced distance-vector routing protocol that includes features of both distance-vector and link-state protocols. It’s known for its efficiency and scalability in larger network architectures.

      The administrative distance for internal EIGRP routes is set to 90. This is in contrast to OSPF (Open Shortest Path First) which has a default administrative distance of 110, IS-IS (Intermediate System to Intermediate System) which is 115, and BGP (Border Gateway Protocol) where external routes have an administrative distance of 20 and internal routes have an administrative distance of 200. The administrative distance for internal EIGRP routes signifies a high level of trust in the routing information it provides, making it a preferred choice over many other dynamic routing protocols in networks where it is configured.

  17. What is the administrative distance of an external EIGRP route?

    • 170
    • 200
    • 115
    • 110
    • Explanation & Hints:

      The administrative distance of an external EIGRP (Enhanced Interior Gateway Routing Protocol) route is:

      • 170

      Explanation:

      Administrative distance is a numerical value that routers use to rank the trustworthiness of routes received from different routing sources. A lower administrative distance is considered more reliable.

      External EIGRP routes are those imported into EIGRP from other routing domains or protocols. The administrative distance for external EIGRP routes is set to 170, indicating a lower level of trust compared to internal EIGRP routes, which have an administrative distance of 90. This differentiation allows routers to prefer internal routes over external ones, underlining the principle that routes within the same routing protocol domain are generally considered more reliable than routes learned from outside. This setting helps ensure that the routing decisions made by EIGRP prioritize internal network paths over those learned from external sources, unless explicitly configured otherwise.

  18. What is the administrative distance of an external EIGRP route?

    • 170
    • 115
    • 110
    • 90
    • Explanation & Hints:

      The administrative distance of an external EIGRP (Enhanced Interior Gateway Routing Protocol) route is 170. Administrative distance is a metric used by routers to select the best path when there are two or more different routes to the same destination from two different routing protocols. The concept of administrative distance is crucial because it helps to prioritize routing information received from multiple sources. A lower administrative distance is considered more trustworthy and is preferred over a higher one. Here’s a quick overview of the administrative distances for the options provided:

      • 170 for External EIGRP routes, which are routes learned from another autonomous system.
      • 115 is not a standard administrative distance for common routing protocols.
      • 110 is the administrative distance for OSPF (Open Shortest Path First).
      • 90 is the administrative distance for Internal EIGRP routes, which are routes within the same EIGRP autonomous system.

      Therefore, the correct answer is 170 for external EIGRP routes.

  19. What is the administrative distance of an IS-IS route?

    • 115
    • 1
    • 5
    • 0
    • Explanation & Hints:

      The administrative distance of an IS-IS (Intermediate System to Intermediate System) route is 115. Administrative distance is a value that networking devices use to rate the trustworthiness of a route received from a routing protocol. The lower the value, the more trusted the route. Here’s the relevance of the numbers provided:

      • 115 is the default administrative distance for IS-IS routes.
      • 1 is typically the administrative distance for static routes configured to point through an interface.
      • 5 is not a standard administrative distance for widely used routing protocols.
      • 0 is the administrative distance for directly connected interfaces.

      Hence, the correct answer for an IS-IS route is 115.

  20. What is the administrative distance of a static route?

    • 1
    • 5
    • 20
    • 0
    • Explanation & Hints:

      The administrative distance of a static route can vary depending on how it is configured, but the most common administrative distances for static routes are 1 and 0:

      • 1 is the default administrative distance for static routes that are configured to go through a next-hop IP address.
      • 0 is the administrative distance for static routes that are configured to go through a directly connected interface, often seen in the context of a directly connected static route.

      The options 5 and 20 are not standard administrative distances for static routes in most routing environments:

      • 5 is not typically associated with the administrative distance of common routing protocols or static routes.
      • 20 is often associated with external routes in EIGRP (Enhanced Interior Gateway Routing Protocol).

      Therefore, the correct answer for the administrative distance of a static route is generally considered to be 1 when referring to a next-hop IP address configuration.

  21. What is the administrative distance of a static route?

    • 1
    • 110
    • 90
    • 115
    • Explanation & Hints:

      The administrative distance of a static route is 1. Administrative distance is a metric used by routers to select the best path when there are two or more routes to the same destination learned via different routing protocols. The lower the administrative distance value, the more preferred the route. The options provided and their typical administrative distances are:

      • 1 for static routes configured with a next-hop IP address, indicating a high level of trustworthiness.
      • 110 is the administrative distance for OSPF (Open Shortest Path First) routes.
      • 90 is the administrative distance for Internal EIGRP (Enhanced Interior Gateway Routing Protocol) routes.
      • 115 is the administrative distance for IS-IS (Intermediate System to Intermediate System) routes.

      Thus, for a static route, the correct administrative distance is 1.

  22. What is the administrative distance of an EIGRP summary route?

    • 5
    • 20
    • 90
    • 110
    • Explanation & Hints:

      The administrative distance of an EIGRP (Enhanced Interior Gateway Routing Protocol) summary route is 5. EIGRP summary routes are created to aggregate several routes into a single route, reducing the size of the routing table and improving network efficiency. The administrative distance is used to rate the trustworthiness of routing information received from different sources, with lower values being more trusted. Here’s how the provided options stand:

      • 5 is the correct administrative distance for EIGRP summary routes, indicating a high level of trust.
      • 20 is typically associated with external BGP (Border Gateway Protocol) routes.
      • 90 is the administrative distance for internal EIGRP routes, those within the same autonomous system.
      • 110 is the administrative distance for OSPF (Open Shortest Path First) routes.

      Therefore, the administrative distance for an EIGRP summary route is 5.

  23. What is the administrative distance of an OSPF route?

    • 110
    • 115
    • 170
    • 90
    • Explanation & Hints:

      The administrative distance of an OSPF (Open Shortest Path First) route is 110. Administrative distance is a value that network devices use to determine the trustworthiness of a route received from a routing protocol, with lower values being considered more reliable. Here’s the relevance of the numbers provided:

      • 110 is the correct administrative distance for OSPF routes.
      • 115 is typically associated with IS-IS (Intermediate System to Intermediate System) routes.
      • 170 is the administrative distance for external EIGRP (Enhanced Interior Gateway Routing Protocol) routes.
      • 90 is the administrative distance for internal EIGRP routes.

      Therefore, the correct answer for an OSPF route is 110.

  24. What is the administrative distance of a directly connected interface?

    • 0
    • 1
    • 5
    • 20
    • Explanation & Hints:

      The administrative distance of a directly connected interface is 0. Administrative distance is a metric that routers use to rate the trustworthiness of a route received through a routing protocol. A directly connected interface, representing a network segment that is physically or logically directly accessible to the router, is considered the most trustworthy type of route. Hence, it is assigned the lowest possible administrative distance, which is 0. This indicates an absolute trust level in the accuracy of the route.

  25. Refer to the exhibit. R2 has two possible paths to the 192.168.10.4 network. What would make the alternate route meet the feasibility condition?

    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 02
    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 02
    • a reported distance less than 3523840
    • a reported distance greater than 41024000
    • a feasible distance greater than 41024000
    • an administrative distance less than 170
      Answers Explanation & Hints:

      To meet the feasibility condition, the reported distance (RD) to a network must be less than the current feasible distance to the same destination network. In this example the current feasible distance is 3523840. This means that to be a feasible successor, a route would need a reported distance less than 3523840.

  26. Which protocol number is used to indicate that an EIGRP packet is encapsulated in an IP packet?

    • 6
    • 17
    • 88
    • 89
      Answers Explanation & Hints:

      In an IP packet header, the field protocol number indicates which protocol is used in the encapsulated PDU. 6 is TCP, 17 is UDP, 88 is EIGRP, and 89 is OSPF.

  27. Match the description to the EIGRP packet type. (Not all options are used.)

    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 001
    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 001
    Answers Explanation & Hints:

    EIGRP uses five different packet types include:

    • Hello packets – Used for neighbor discovery and to maintain neighbor adjacencies.
    • Update packets – Used to propagate routing information to EIGRP neighbors.
    • Acknowledgment packets – Used to acknowledge the receipt of an EIGRP message that was sent using reliable delivery.
    • Query packets – Used to query routes from neighbors.
    • Reply packets – Sent in response to an EIGRP query.
  28. Which statement describes the autonomous system number used in EIGRP configuration on a Cisco router?

    • It carries the geographical information of the organization.
    • It functions as a process ID in the operation of the router.
    • It is a globally unique autonomous system number that is assigned by IANA.
    • It identifies the ISP that provides the connection to network of the organization.
      Answers Explanation & Hints:

      The autonomous system number used in the EIGRP configuration is not associated with the Internet Assigned Numbers Authority (IANA) globally assigned autonomous system numbers that are used by external routing protocols. It just functions as a process ID, which is necessary because a router may run multiple instances of EIGRP. Each instance of EIGRP can be configured to support and exchange routing updates for different networks. An organization has the freedom to choose its own AS number in the EIGRP configuration.

  29. Which bandwidth value is used when calculating the EIGRP metric of a route?

    • the fastest bandwidth of all interfaces on the router
    • the slowest bandwidth of all interfaces on the router
    • the fastest bandwidth of all outgoing interfaces between the source and destination
    • the slowest bandwidth of all outgoing interfaces between the source and destination
      Answers Explanation & Hints:

      The bandwidth factor that is used to calculate the composite metric of the EIGRP is defined as the slowest bandwidth of all outgoing interfaces between the source and destination.

  30. Refer to the exhibit. All the routers that are displayed are part of the EIGRP domain. Assuming EIGRP metric weights are not altered in the configurations, which path will a packet take that originates from a host on the 192.168.1.0/24 network and is going to a host on the 192.168.2.0/24 network?

    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 03
    CCNPv8 ENCOR (Version 8.0) – Chapters 6 – 7 Routing Essentials and EIGRP Exam Answers 03
    • R1, R4, R3
    • R1, R5, R3
    • R1, R2, R3
    • R1, R2, R5, R3
      Answers Explanation & Hints:

      EIGRP only uses the slowest bandwidth in its composite metric. The slowest bandwidth in the path R1, R2, R5, R3 is 64 kb/s and thus offers the best path to the 192.168.2.0/24 network.

  31. Which two metric weights are set to one by default when costs in EIGRP are being calculated? (Choose two.)

    • k1
    • k2
    • k3
    • k4
    • k5
    • k6
      Answers Explanation & Hints:

      By default, k1 and k3 are set to one and k2, k4, and k5 are set to zero during cost calculation by the EIGRP process. There is no k6 value.

  32. Which routing protocol supports load balancing across links with unequal costs?

    • OSPFv2
    • EIGRP
    • RIPv2
    • OSPFv3
      Answers Explanation & Hints:

      Routing protocols with two or more paths to a destination network can load balance traffic across multiple paths. EIGRP is the only routing protocol that supports load balancing across unequal cost paths.

  33. How has the EIGRP routing protocol improved by having interface delay measured in picoseconds instead of microseconds?

    • It speeds up convergence.
    • It allows for a larger number of networks.
    • It provides better metrics for high speed interfaces.
    • It improves performance and communication time between directly connected neighbor routers.
      Answers Explanation & Hints:

      The original values used to calculate EIGRP metrics were in microseconds for delay and kilobytes per second for bandwidth. When using EIGRP wide metrics, the delay units are picoseconds and within the formula, the metric is found by multiplying by 65,535 instead of 256, thus providing support of interface bandwidth up to 655 terabits per second.

  34. If all router Ethernet interfaces in an EIGRP network are configured with the default EIGRP timers, how long will a router wait by default to receive an EIGRP packet from its neighbor before declaring the neighbor unreachable?

    • 10 seconds
    • 15 seconds
    • 20 seconds
    • 30 seconds
      Answers Explanation & Hints:

      EIGRP uses the hold time as the maximum time it should wait for receiving a hello packet (or other EIGRP packets) from its neighbor before declaring that the neighbor is unreachable. By default the hold time is 3 times greater than the hello interval. On LAN interfaces, the default hello time is 5 seconds and the default hold time is 15 seconds.

  35. What two conditions will result in an EIGRP route going into the active state? (Choose two.)

    • One neighbor has not met the feasibility condition.
    • The router is not sending queries.
    • The successor is down.
    • There is no feasible successor.
    • The network has been recalculated.
      Answers Explanation & Hints:

      If a successor is no longer available, and there is no feasible successor, an EIGRP route will be put into the active state while the router actively searches for a new path to the destination.

  36. An EIGRP router loses the route to a network. Its topology table contains two feasible successors to the same network. What action will the router take?

    • The DUAL algorithm is recomputed to find an alternate route.
    • The router uses the default route.
    • The best alternative backup route is immediately inserted into the routing table.
    • The router will query neighbors for an alternate route.
      Answers Explanation & Hints:

      Because EIGRP uses the DUAL algorithm, the router is able to maintain information on all potential loop-free backup routes. In the event of the failure of a routing table entry, the router immediately inserts the best backup route into the routing table.

  37. Which feature of the EIGRP routing protocol can provide fast re-convergence without DUAL recomputation in the event of a route failure?

    • having a successor route
    • having a feasible successor route
    • having a route in the passive state
    • having a route in the active state
      Answers Explanation & Hints:

      EIGRP avoids DUAL recomputation of routes whenever possible by maintaining a list of backup routes (feasible successors) in the topology table already determined to be loop-free. If the primary route (the successor route, which is in the passive state) in the routing table fails, the best backup route is immediately added to the routing table. A route in the active state is in the process of being recomputed by DUAL.

  38. What are two benefits of applying summarization to networks within a company that uses the EIGRP routing protocol? (Choose two.)

    • reduced size of routing tables
    • reduced number of Layer 3 switches required
    • reduced number of routers that must maintain a neighbor adjacency
    • reduced number of hops the packet must travel throughout the network
    • reduced impact when a route goes active
      Answers Explanation & Hints:

      When summarization is applied within any routing protocol, the routing tables within the organization are smaller. An added benefit to EIGRP-enabled routers is that when a route goes active during convergence or when a link has gone down and there is no feasible successor, the number of routers that receive query packets is reduced.

  39. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the reported distance of the successor route for 172.18.3.0/24?

    • 28160
    • 2172416
    • 2684416
    • 2072316
    • Explanation & Hints:

      The reported distance (RD) of the successor route for the network 172.18.3.0/24, as indicated in the EIGRP topology table, is 28160. This value is shown in the parenthesis following the feasible distance (FD) for the route via 172.18.4.3. In EIGRP, the feasible distance is the metric value to reach a network, and the reported distance is the metric value reported by the next-hop router to reach that network. Therefore, for the network 172.18.3.0/24, the successor route’s reported distance is 28160.

  40. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the reported distance of the feasible successor route for 192.168.24.0/24?

    • 2342912
    • 2854912
    • 2072316
    • 227692
    • Explanation & Hints:

      The reported distance (RD) of the feasible successor route for the network 192.168.24.0/24, as shown in the provided EIGRP topology table, is 2342912. This value is indicated in the parenthesis after the feasible distance (FD) for the second route listed for the network 192.168.24.0/24, which is via 172.18.4.3. In EIGRP, the feasible distance is the metric to reach a network from the perspective of the local router, and the reported distance is the metric as reported by the next-hop router for reaching that network. Thus, for the network 192.168.24.0/24, the reported distance of the feasible successor route via 172.18.4.3 is 2342912.

  41. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the reported distance of the feasible successor route for 192.168.24.0/24?

    • 2342912
    • 3072
    • 2937
    • 2495120
    • Explanation & Hints:

      For the network 192.168.24.0/24, the feasible successor route is the one with the second-best metric that still satisfies the feasibility condition (the reported distance of the feasible successor must be less than the feasible distance of the successor). In the provided EIGRP topology table, two routes to 192.168.24.0/24 are listed:

      1. via 192.168.13.5 with a feasible distance (FD) of 2684416 and a reported distance (RD) of 2072316.
      2. via 172.18.4.3 with an FD of 2854912 and an RD of 2342912.

      The feasible successor route for 192.168.24.0/24 is the one via 172.18.4.3 because it is listed as an alternative route. The reported distance for this route, which is the metric value reported by the next-hop router, is 2342912. This distinguishes it as the RD of the feasible successor route for the network 192.168.24.0/24. The other numbers provided (3072, 2937, and 2495120) do not apply to the feasible successor’s RD for this specific network route.

  42. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the reported distance of the successor route for 10.34.1.0/24?

    • 2937
    • 2495120
    • 3072
    • 227692
    • Explanation & Hints:

      For the network 10.34.1.0/24, the successor route is the one via 10.13.1.3, with a feasible distance (FD) of 3072 and a reported distance (RD) of 2937. The reported distance is the metric value that the next-hop router reports for reaching the destination network. Therefore, the reported distance of the successor route for 10.34.1.0/24 is 2937.

  43. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the metric for the successor route for 172.18.5.0/24?

    • 2495120
    • 227692
    • 2854912
    • 3072
    • Explanation & Hints:

      The metric for the successor route for the network 172.18.5.0/24 is 2495120. In EIGRP, the metric listed first in the parentheses next to the route is the feasible distance (FD) to the destination network, which represents the total cost to reach that network. The second number in the parentheses is the reported distance (RD) from the next-hop router. Therefore, for 172.18.5.0/24, the metric (feasible distance) for the successor route via 172.18.6.3 is 2495120.

  44. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the metric for the successor route for 172.18.5.0/24?

    • 2495120
    • 5376
    • 2937
    • 3072
    • Explanation & Hints:

      The metric for the successor route for the network 172.18.5.0/24 is 2495120. This number represents the feasible distance (FD) for the route to reach the 172.18.5.0/24 network, as indicated in the EIGRP topology table. The feasible distance is the metric that EIGRP uses to determine the best path to a destination network, which in this case is via 172.18.6.3 on Serial0/1/0.

  45. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the metric for the feasible successor route for 10.34.1.0/24?

    • 5376
    • 2937
    • 3072
    • 2495120
    • Explanation & Hints:

      The metric for the feasible successor route for the network 10.34.1.0/24 is 5376. In the EIGRP topology table provided, there are two routes to the network 10.34.1.0/24:

      1. The successor route via 10.13.1.3 with a metric (feasible distance) of 3072 and a reported distance (RD) of 2937.
      2. The feasible successor route via 10.14.1.4 with a metric of 5376 and the same RD of 2937.

      The feasible successor is an alternate path that satisfies EIGRP’s feasibility condition, meaning its RD is less than the feasible distance of the successor route. In this context, the metric (or feasible distance) for the feasible successor route to 10.34.1.0/24 via 10.14.1.4 is 5376.

  46. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the metric for the successor route for 10.34.1.0/24?

    • 3072
    • 2937
    • 2495120
    • 227692
    • Explanation & Hints:

      The metric for the successor route for the network 10.34.1.0/24 is 3072. This value represents the feasible distance (FD) for the route via 10.13.1.3, as shown in the EIGRP topology table. The feasible distance is the total cost from the router to the destination network, making it the metric used by EIGRP to determine the best path to that network.

  47. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the metric for the successor route for 172.18.3.0/24?

    • 2172416
    • 2684416
    • 2072316
    • 2342912
    • Explanation & Hints:

      The metric for the successor route for the network 172.18.3.0/24 is 2172416. This value represents the feasible distance (FD) for the route via 172.18.4.3, as shown in the EIGRP topology table. The feasible distance is the metric used by EIGRP to determine the best path to the destination network, which in this case is for reaching the 172.18.3.0/24 network.

  48. Refer to a portion of an EIGRP topology table:

    P 172.18.3.0/24, 1 successors, __ is 2172416
    via 172.18.4.3 (2172416/28160), Serial0/0/1
    P 172.18.5.0/24, 1 successors, __ is 2495120
    via 172.18.6.3 (2495120/227692), Serial0/1/0
    P 192.168.24.0/24, 1 successors, __ is 2684416
    via 192.168.13.5 (2684416/2072316), Serial0/0/0
    via 172.18.4.3 (2854912/2342912), Serial0/0/1
    P 10.34.1.0/24, 1 successors, __ is 3072
    via 10.13.1.3 (3072/2937), GigabitEthernet0/1
    via 10.14.1.4 (5376/2937), GigabitEthernet0/2

    What is the feasible distance of the 172.18.5.0/24 route?

    • 2495120
    • 2854912
    • 2342912
    • 227692
    • Explanation & Hints:

      The feasible distance (FD) of the route for the network 172.18.5.0/24 is 2495120. This value represents the metric used by EIGRP to reach the destination network from the local router, indicating the total cost of the path to the network via 172.18.6.3 as listed in the EIGRP topology table.

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