CCNA 3 Module 3 V3.1 Answers

1. Which Layer 4 protocol does EIGRP use to provide reliability for the transmission of routing information?








2. Which of the following statements describes the bounded updates used by EIGRP?

Bounded updates are sent to all routers within an autonomous system.

Partial updates are sent only to routers that need the information.

The updates are sent to all routers in the routing table.

Updates are bounded by the routers in the topology table.


3. What is the EIGRP term for a backup route?

backup route

default route

feasible successor route


secondary route

successor route


4. Why would it be necessary to configure the bandwidth setting on an EIGRP interface rather than leaving it at the default setting? (Choose two.)

A suboptimal route may be chosen as the best path to a destination if the bandwidth setting is higher than the actual bandwidth of the link.

The network may be unable to converge if the bandwidth setting does not match the actual bandwidth of the link.

Routing updates might arrive too fast for the interface to handle and be discarded because of buffer overflow.

The configured bandwidth must match the actual speed of the link so the link will operate properly.

Setting the bandwidth to a higher rate will optimize the effective throughput of the link.


5. If an EIGRP route goes down and a feasible successor is not found in the topology table, how does DUAL flag the route that has failed?








6. What tables does EIGRP maintain for each routed protocol it supports? (Choose three.)

adjacency table

topology table

neighbor table

routing table

link state table

ARP table


7. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.)





shortest path


8. Which of the following are found in the EIGRP neighbor table? (Choose two.)

routes installed by DUAL

lowest calculated metric to each destination

network layer address of the neighbor routers

number of EIGRP packets waiting to be sent

feasible distance to each neighbor


9. Which of the following router commands is recommended only for troubleshooting specific types of network problems, not for monitoring normal network operation?




terminal monitor


10. Which EIGRP command is used to view all routes that are known by the router?

show ip eigrp interfaces detail

show ip eigrp traffic

show ip eigrp neighbors

show ip eigrp topology all-links


11. What is the default administrative distance of EIGRP internal routes?








12. What is the advantage of routers forming adjacencies when using EIGRP? (Choose three.)

Neighbor routers can quickly take over for a router that is in passive mode.

New routers and their routes can quickly be discovered by neighbor routers.

A router can share routing loads with neighbor routers.

A router can quickly discover when a neighbor router is no longer available.

Changes in network topology can quickly be shared with neighbor routers.

Neighbor routers can save overhead by sharing their DUAL databases.


13. Which of the following types of routes will be denoted by EX in EIGRP routing table entries? (Choose two.)

routes learned from other routing protocols

routes learned from any non-adjacent EIGRP routers

any route with a hop count metric higher than 224

EIGRP routes that originate in different autonomous systems

all passive routes in the routing table


14. Which command will help identify established OSPF neighbor adjacencies?

router# show ospf neighbor

router# debug neighbor events

router# debug ip ospf neighbor

router# show ip ospf neighbor


15. Which command will display only the current EIGRP routing table entries?

Router# show ip route

Router# show ip route eigrp

Router# show eigrp route

Router# show eigrp protocol



CCNA 3 Module 3 V3.1 Answers (1)
Host in the network illustrated is unable to ping host How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.)

R1(config-router)# network

R1(config-router)# auto-summary

R1(config-router)# no auto-summary

R2(config-router)# no auto-summary

R2(config-router)# auto-summary

R2(config-router)# network


17. What information is maintained in the EIGRP topology database for a destination route? (Choose three.)

the routing protocol

the feasible distance of the route

the highest cost of the route

the SRTT value for the route

the route cost as advertised by the neighboring router

the physical address of the gateway interface

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