Cisco 642-902 Online Practice Questions and Exam Preparation

Cisco 642-902 Online Questions & Answers

• Question 201:

  To make OSPF area 4 a totally stubby area, which two things need to be done? (Choose two.)

  A. Apply the area 4 stub command to all routers in the area.
  B. On the ABR, use the area 4 stub command with the no-summary keyword.
  C. On the ABR, specify a default cost for the area with the area default-cost command.
  D. On the ABR, use the default-information originates command to inject a default route into area 4.
  E. Use the auto-cost command on each router in the area to automatically determine the cost to other OSPF areas.
  A. Apply the area 4 stub command to all routers in the area.
  B. On the ABR, use the area 4 stub command with the no-summary keyword.

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  To make an area "totally stubby" we must apply the "area area-id stub no-summary" command on the ABR and area area-id stub" commands to all other routers in that area. Note: The ABR in a totally stubby area does not create Type 3 summary LSA. It only creates a default route to outside destinations.

• Question 202:

  Refer to the exhibit.

  

  Which three statements are true? (Choose three.)

  A. On the routing table of R4, the 10.1.1.0/24 route appears as an O E2 route.
  B. On R4, the 172.16.1.0/24 route has a metric of 20.
  C. The R3 S0/0 interface should not need the no ip split-horizon eigrp 1 configuration command for the 172.16.1.0/24 route to appear in the routing table of R2 as an D EX route.
  D. The administrative distance of the 172.16.1.0/24 route in the routing table of R3 is 170.
  E. On R5, the 4.0.0.0/8 route will have an administrative distance of 120 and a hop count of 6.
  A. On the routing table of R4, the 10.1.1.0/24 route appears as an O E2 route.
  B. On R4, the 172.16.1.0/24 route has a metric of 20.
  D. The administrative distance of the 172.16.1.0/24 route in the routing table of R3 is 170.

  ---

  When redistributing into OSPF, the default route type is E2. Notice that the cost of E2 type is always the cost of external route only.

  Also, the default seed metric when redistributing into OSPF is always 20 (except for BGP, which is 1)

  When redistributing into EIGRP, the external EIGRP routes have an administrative distance of 170 by default

• Question 203:

  Refer to the exhibit.

  

  Examine the partial configuration and the routing table excerpt. Which routes would be redistributed into OSPF area 1?

  A. 10.10.10.16/28 only
  B. 10.10.10.16/28 and 10.10.10.64/26
  C. 10.10.10.16/28, 10.10.10.64/26, and 172.16.10.0/24
  D. 10.10.10.64/26 only
  D. 10.10.10.64/26 only

• Question 204:

  Which are three features of EIGRP? (Choose three)

  A. Support VLSM and discontiguous subnets
  B. Link-state protocol
  C. Partial routing updates
  D. External Administrative distance is 100
  E. Fast convergence.
  F. Used by other vendors than Cisco
  A. Support VLSM and discontiguous subnets
  C. Partial routing updates
  E. Fast convergence.

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  Reference: http://cisco.jjc.edu/cnt205/ch2/2_1_1/index.html (See first three bullets)

• Question 205:

  In EIGRP, when the IP default-network command is configured on a router, what is generated in the router's configuration?

  A. A static route
  B. A directly connected route
  C. An EIGRP route
  D. A default route
  A. A static route

  ---

  When you configure the ip default-network command and specify a subnet, a static route (the ip route command) is generated in the router's configuration; however, the IOS does not display a message to indicate that this has been done. The entry appears as a static route in the routing table of the router where the command is configured. This can be confusing when you want to remove the default network; the configuration must be removed with the no ip route command, not with the no ip default-network command.

• Question 206:

  

  The company and the company network have both been growing rapidly. Multiple adds, moves and changes have been applied to the network. Your boss has asked you to troubleshoot a recent OSPF synchronization problem that has arisen. There have been synchronization problems at separate locations in the OSPF area 0. There have been reported link failures during the rapid growth of the company network. You are required to resolve the OSPF problem. OSPF must be able to converge when the network changes. Refer to the information above to answer the following question.

  Which configuration command on D1 (with a similar command on D2) will provide an immediate solution to the missing route problem?

  A. no area 16 stub
  B. no area 16 authentication message-digest
  C. area 16 virtual-link 8.187.175.82
  D. area 16 virtual-link 172.16.4.2
  E. no area 16 stub no-summary
  F. network 172.16.0.0.0.0.255.255 area 16
  G. None of the above
  C. area 16 virtual-link 8.187.175.82

  ---

  To fix this problem immediately without changing the topology we need to create virtual link between D1 and D2.

• Question 207:

  What is the international standard for transmitting data over a cable system?

  A. PPPoE
  B. DOCSIS
  C. CMTS
  D. AAL5
  B. DOCSIS

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  Reference: http://www.cablelabs.com/news/pr/1998/1998_03_19.html (see first para)

• Question 208:

  Refer to the exhibit.

  

  For the accompanying router output, which of the following statements describes the state that neighbor 172.16.254.3 is in?

  A. BGP can exchange routing information in this state.
  B. The router will not accept connections from the peer.
  C. The router is listening on its server port for connection requests from the peer.
  D. The router has sent out an active TCP connection request to the peer.
  C. The router is listening on its server port for connection requests from the peer.

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  The BGP state in the output is "Active", which means BGP speaker is attempting to initiate a TCP session with the BGP speaker it wants to peer with. If this can be done, the BGP state goes to OpenSent state.

• Question 209:

  What is IPv6 router solicitation?

  A. a request made by a node to join a specified multicast group
  B. a request made by a node for its IP address
  C. a request made by a node for the IP address of the DHCP server
  D. a request made by a node for the IP address of the local router
  D. a request made by a node for the IP address of the local router

  ---

  Reference: http://computernetworkingnotes.com/ipv6-features-concepts-and- configurations/ipv6-neighbor-discovery.html (See router solicitation)

• Question 210:

  Refer to the exhibit. You have completed an OSPF implementation, and you are verifying OSPF operation. You notice that router A and router B are stuck in the two-way state. From the show ip ospf interface command output, what is the cause of this issue?

  

  A. All OSPF implementations must have at least one interface in area 0.
  B. You are attempting to run in the broadcast mode over an NBMA interface.
  C. Both routers are configured to function as a BDR; therefore, there is no DR router.
  D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.
  E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.
  E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.

  ---

  When OSPF adjacency is formed, a router goes through several state changes before it becomes fully adjacent with its neighbor. The states are Down, Attempt, Init, 2-Way, Exstart, Exchange, Loading, and Full.

  An OSPF neighbor reaches the 2-way state when bidirectional communication is established (each router has seen the other's hello packet). This is the beginning of an OSPF adjacency. On broadcast media and non-broadcast multiaccess networks, the DR and BDR are elected in this state. But the priority on both routers are 0 so no DR and BDR are elected -> These routers stay in the 2-way state.

  (Reference and a good resource of OSPF Neighbor states: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0e.shtml)