CCNA 3 Chapter 6: EIGRP (v5.0.3 + v6.0) Exam Answers – 100% Result

Certification Answers

Q1. Question

Explanation:  No answer description available for this question

Q2. Which three metric weights are set to zero by default when costs in EIGRP are being calculated? (Choose three.)

  • k5
  • k6
  • k2
  • k4
  • k3
  • k1
Explanation:  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.

Q3. What information does EIGRP maintain within the routing table?

  • only successors
  • all routes known to the router
  • only feasible successors
  • both successors and feasible successors
  • adjacent neighbors
Explanation:  No answer description available for this question

Q4. Which configuration is necessary to ensure successful operation of EIGRP for IPv6?

  • The eigrp router-id command requires an IPv6 address within the router configuration mode.
  • The network command is required within the router configuration mode.
  • The no shutdown command is required within the router configuration mode.
  • The router eigrp autonomous-system command is required within the router configuration mode.
Explanation:  By default, the EIGRP for IPv6 process is in a shutdown state. The EIGRP for IPv6 process must be activated by using the no shutdown command within router configuration mode.

Q5. Fill in the blank.

In an EIGRP topology table, a route that is in a/an active state will cause the Diffusing Update Algorithm to send EIGRP queries that ask other routers for a path to this network.
Explanation:  When a route is designated by an “A” in the EIGRP topology table, the route is in an active state. The router is actively attempting to find another path to this network.

Q6. Question

Explanation:  No answer description available for this question

Q7. Fill in the Blank. Use the abbreviation.

EIGRP uses the protocol RTP to deliver EIGRP packets to neighbors.
Explanation:  No answer description available for this question

Q8. What is identified within the opcode of an EIGRP packet header?

  • the EIGRP sum of delays from source to destination
  • the EIGRP hold timer agreed upon with a neighbor
  • the EIGRP message type that is being sent or received from a neighbor
  • the EIGRP autonomous system metrics
Explanation:  The EIGRP packet header opcode is used to identify the EIGRP packet type: update (1), query (3), reply (4), and hello (5).

Q9. Which table is used by EIGRP to store all routes that are learned from EIGRP neighbors?

  • the adjacency table
  • the routing table
  • the topology table
  • the neighbor table
Explanation:  EIGRP routers maintain a topology table that includes entries for every destination that the router learns from directly connected EIGRP neighbors.

Q10. When an EIGRP-enabled router uses a password to accept routes from other EIGRP-enabled routers, which mechanism is used?

  • Reliable Transport Protocol
  • partial updates
  • EIGRP authentication
  • bounded updates
  • Diffusing Update Algorithm
Explanation:  EIGRP authentication allows a router to accept routing information only from other routers that are configured with the same password.

Q11. Which destination MAC address is used when a multicast EIGRP packet is encapsulated into an Ethernet frame?

  • 01-00-5E-00-00-09
  • 01-00-5E-00-00-10
  • 01-00-5E-00-00-0A
  • 01-00-5E-00-00-0B
Explanation:  When an EIGRP multicast packet is encapsulated into an Ethernet frame, the destination MAC address is 01-00-5E-00-00-0A.

Q12. What is the purpose of using protocol-dependent modules in EIGRP?

  • to describe different routing processes
  • to identify different application layer protocols
  • to accommodate routing of different network layer protocols
  • to use different transport protocols for different packets
Explanation:  EIGRP is designed to route several network layer protocols by using the PDMs. For example, EIGRP can be used to route both IPv4 and IPv6, as well as other network layer protocols. There is a separate instance of PDM for different network layer protocols.

Q13. 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
Explanation:  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.

Q14. Which command or commands must be entered on a serial interface of a Cisco router to restore the bandwidth to the default value of that specific router interface?

  • shutdown no shutdown
  • bandwidth 1500
  • copy running-config startup-config reload
  • no bandwidth
Explanation:  The command used to restore the default bandwidth on a serial interface of a Cisco router is no bandwidth. The default bandwidth on most, but not all, Cisco router serial interfaces is 1544 kb/s.

Q15. Which two factors does an EIGRP router use to determine that a route to a remote network meets the feasible condition and is therefore loop-free? (Choose two.)

  • the feasible distance on the local router
  • the reported distance on a neighbor router
  • the administrative distance on the remote router
  • the successor route on a neighbor router
  • the feasible successor route on the remote router
Explanation:  The EIGRP feasible condition (FC) is met when the reported distance (RD) on a neighbor router to a network is less than the local router feasible distance (FD) to the same destination network.

Q16. Why would a network administrator use a wildcard mask in the network command when configuring a router to use EIGRP?

  • to exclude some interfaces from the EIGRP process
  • to send a manual summarization
  • to lower the router overhead
  • to subnet at the time of the configuration
Explanation:  The wilcard mask in the EIGRP network command is used to define precisely which network or subnets participate in the EIGRP process. Only interfaces that have addresses in a subnet included in a network command will participate in EIGRP.

Q17. Question

Explanation:  No answer description available for this question

Q18. What protocol is use by EIGRP to deliver EIGRP packets to neighbors?

  • UDP
  • TCP
  • RTP
  • DTP
Explanation:  Because EIGRP can route non-IP protocols it cannot use, TCP or UDP for reliable EIGRP packet delivery. Instead it uses Reliable Transport Protocol (RTP).

Q19. Which condition will cause DUAL to put an EIGRP route into the active state?

  • The successor and feasible successor are both available.
  • The successor is available but there is no feasible successor.
  • The successor is no longer available but there is a feasible successor.
  • The successor is no longer available and there is no feasible successor.
Explanation:  DUAL will put an EIGRP route into the active state if the successor becomes unavailable and there is no feasible successor in the topology table. When a network enters the active state, DUAL must query neighbors for a new successor.

Q20. Which statement describes a characteristic of the delivery of EIGRP update packets?

  • EIGRP sends all update packets via multicast.
  • IGRP sends all update packets via unicast.
  • EIGRP uses a reliable delivery protocol to send all update packets.
  • EIGRP uses UDP to send all update packets.
Explanation:  EIGRP uses a reliable delivery protocol to send update packets. Depending on the need, EIGRP may send update packets with unicast or multicast. For example, update packets are sent as a multicast when required by multiple routers, or as a unicast when required by only a single router.

Q21. An administrator issues the router eigrp 100 command on a router. What is the number 100 used for?

  • as the length of time this router will wait to hear hello packets from a neighbor
  • as the number of neighbors supported by this router
  • as the autonomous system number
  • as the maximum bandwidth of the fastest interface on the router
Explanation:  The router eigrp 100 command uses the number as a process-id to keep track of the running instance of the EIGRP process, as several EIGRP processes can be run at the same time. This number is called autonomous system number.

Q22. Which two EIGRP packet types are sent with unreliable delivery? (Choose two.)

  • query
  • update
  • hello
  • acknowledgment
  • reply
Explanation:  The update, query, and reply EIGRP packet types require reliable delivery.

Q23. A network administrator wants to verify the default delay values for the interfaces on an EIGRP-enabled router. Which command will display these values?

  • show running-config
  • show ip protocols
  • show interfaces
  • show ip route
Explanation:  The show interfaces command is used to show the delay, in microseconds, of a specified interface. This command will also provide the default delay value or an administratively configured value. The show running-config command will only display an administratively configured value. The commands show ip route and show ip protocols will not provide the delay value of each interface.

Q24. Question

Explanation:  No answer description available for this question

Q25. A new network administrator has been asked to verify the metrics that are used by EIGRP on a Cisco device. Which two EIGRP metrics are measured by using static values on a Cisco device? (Choose two.)

  • load
  • reliability
  • bandwidth
  • MTU
  • delay
Explanation:  Bandwidth and delay are static values that are not actually tracked by a device. Load and reliability are tracked dynamically by a device over a default period of time. MTU is not used for EIGRP metrics.

Q26. Question

Explanation:  No answer description available for this question

Q27. Question

Explanation:  No answer description available for this question

Q28. Which statement describes a multiarea OSPF network?

  • It consists of multiple network areas that are daisy-chained together.
  • It requires a three-layer hierarchical network design approach.
  • It has a core backbone area with other areas connected to the backbone area.
  • It has multiple routers that run multiple routing protocols simultaneously, and each protocol consists of an area.
Explanation:  A multiarea OSPF network requires hierarchical network design (with two levels). The main area is called the backbone area, and all other areas must connect to the main area.

Q29. What is one advantage of using multiarea OSPF?

  • It allows OSPFv2 and OSPFv3 to be running together.
  • It enables multiple routing protocols to be running in a large network.
  • It increases the routing performance by dividing the neighbor table into separate smaller ones.
  • It improves the routing efficiency by reducing the routing table and link-state update overhead.
Explanation:  A multiarea OSPF network improves routing performance and efficiency in a large network. As the network is divided into smaller areas, each router maintains a smaller routing table because routes between areas can be summarized. Also, fewer updated routes means fewer LSAs are exchanged, thus reducing the need for CPU resources. Running multiple routing protocols simultaneously and implementing both IPv4 and IPv6 are not primary considerations for a multiarea OSPF network.

Q30. Which characteristic describes both ABRs and ASBRs that are implemented in a multiarea OSPF network?

  • They usually have many local networks attached.
  • They both run multiple routing protocols simultaneously.
  • They are required to perform any summarization or redistribution tasks.
  • They are required to reload frequently and quickly in order to update the LSDB.
Explanation:  No answer description available for this question

Q31. An ABR in a multiarea OSPF network receives LSAs from its neighbor that identify the neighbor as an ASBR with learned external networks from the Internet. Which LSA type would the ABR send to other areas to identify the ASBR, so that internal traffic that is destined for the Internet will be sent through the ASBR?

  • LSA type 1
  • LSA type 2
  • LSA type 3
  • LSA type 4
  • LSA type 5
Explanation:  No answer description available for this question

Q32. Which two statements correctly describe OSPF type 3 LSAs? (Choose two.)

  • Type 3 LSAs are known as autonomous system external LSA entries.
  • Type 3 LSAs are generated without requiring a full SPF calculation.
  • Type 3 LSAs are used for routes to networks outside the OSPF autonomous system.
  • Type 3 LSAs are known as router link entries.
  • Type 3 LSAs are used to update routes between OSPF areas.
Explanation:  No answer description available for this question

Q33. Question

Explanation:  No answer description available for this question

Q34. A network administrator is verifying a multi-area OSPF configuration by checking the routing table on a router in area 1. The administrator notices a route to a network that is connected to a router in area 2. Which code appears in front of this route in the routing table within area 1?

  • C
  • O
  • O E2
  • O IA
Explanation:  No answer description available for this question

Q35. Which three steps in the design and implementation of a multiarea OSPF network are considered planning steps? (Choose three.)

  • Verify OSPF.
  • Configure OSPF.
  • Define the OSPF parameters.
  • Gather the required parameters.
  • Troubleshoot the configurations.
  • Define the network requirements.
Explanation:  No answer description available for this question

Q36. A network administrator is implementing OSPF in a portion of the network and must ensure that only specific routes are advertised via OSPF. Which network statement would configure the OSPF process for networks 192.168.4.0, 192.168.5.0, 192.168.6.0, and 192.168.7.0, now located in the backbone area, and inject them into the OSPF domain?

  • r1(config-router)# network 192.168.0.0 0.0.0.255 area 1
  • r1(config-router)# network 192.168.4.0 0.0.3.255 area 1
  • r1(config-router)# network 192.168.4.0 0.0.15.255 area 1
  • r1(config-router)# network 192.168.0.0 0.0.3.255 area 0
  • r1(config-router)# network 192.168.4.0 0.0.3.255 area 0
  • r1(config-router)# network 192.168.4.0 0.0.255.255 area 0
Explanation:  No answer description available for this question

Q37. The network administrator has been asked to summarize the routes for a new OSPF area. The networks to be summarized are 172.16.8.0, 172.16.10.0, and 172.16.12.0 with subnet masks of 255.255.255.0 for each network. Which command should the administrator use to forward the summary route for area 15 into area 0?

  • area 0 range 172.16.8.0 255.255.255.248
  • area 0 range 172.16.8.0 255.255.248.0
  • area 15 range 172.16.8.0 255.255.248.0
  • area 15 range 172.16.8.0 255.255.255.248
Explanation:  No answer description available for this question

Q38. Which two networks are part of the summary route 192.168.32.0/22? (Choose two.)

  • 192.168.31.0/24
  • 192.168.33.0/24
  • 192.168.37.0/24
  • 192.168.35.0/24
  • 192.168.36.0/24
  • 192.168.38.0/24
Explanation:  No answer description available for this question

Q39. Where can interarea route summarization be performed in an OSPF network?

  • ASBR
  • DR
  • ABR
  • any router
Explanation:  No answer description available for this question

Q40. Question

Explanation:  No answer description available for this question

Q41. Question

Explanation:  No answer description available for this question

Q42. Which command can be used to verify the contents of the LSDB in an OSPF area?

  • show ip ospf database
  • show ip ospf interface
  • show ip ospf neighbor
  • show ip route ospf
Explanation:  The show ip ospf database command is used to verify the contents of the LSDB. The show ip ospf interface command is used to verify the configuration information of OSPF-enabled interfaces. The show ip ospf neighbor command is used to gather information regarding OSPF neighbor routers. The show ip routeospfcommand will display OSPF-related information in the routing table.

Q43. Fill in the blank.

The backbone area interconnects with all other OSPF area types.
Explanation:  No answer description available for this question

Q44. Fill in the blank. Do not use acronyms.

OSPF type 2 LSA messages are only generated by the designated router to advertise routes in multiaccess networks.
Explanation:  No answer description available for this question

Q45. Fill in the blank. Use a number.

An ASBR generates type 5 LSAs for each of its external routes and floods them into the area that it is connected to.
Explanation:  No answer description available for this question

Q46. Question

Explanation:  No answer description available for this question

Q47. Why do OSPF serial interfaces usually require manual bandwidth configuration?

  • OSPF uses the bandwidth value to compute routes for its routing table.
  • Each side of an OSPF serial link should be configured with a unique value.
  • All serial interfaces default to a value of 1.544 Mb/s.
  • Bandwidth value affects the actual speed of the link.
Explanation:  No answer description available for this question

Q48. What is used to facilitate hierarchical routing in OSPF?

  • autosummarization
  • the use of multiple areas
  • frequent SPF calculations
  • the election of designated routers
Explanation:  No answer description available for this question

Q49. What OSPF LSA type is used to inform routers of the router ID of the DR in each multiaccess network in an OSPF area?

  • type 1
  • type 2
  • type 3
  • type 4
Explanation:  No answer description available for this question

Q50. What type of OSPF LSA is originated by ASBR routers to advertise external routes?

  • type 1
  • type 2
  • type 3
  • type 5
Explanation:  No answer description available for this question

Q51. What routing table descriptor is used to identify OSPF summary networks that originate from an ABR?

  • O
  • O IA
  • O E1
  • O E2
Explanation:  No answer description available for this question

Q52. Question

Explanation:  No answer description available for this question

Q53. Question

Explanation:  No answer description available for this question

Q54. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Fill in the blank. Do not use abbreviations. What is the missing command on router R2 to establish an adjacency between routers R1 and R3?

  • network 172.16.10.0 0.0.0.255 area 0 
Explanation:  No answer description available for this question

Q55. Question

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Q56. Question

Explanation:  No answer description available for this question