2013 Latest 642-902 Pass4sure Free Tests 101-110

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QUESTION 101

You have completed an OSPF implementation, and you are verifying OSPF operation. During this verification, you notice that the OSPF route of 172.16.10.0 is repeatedly appearing and disappearing from the routing table. Further investigation finds that the OSPF CPU utilization is very high and the routers are constantly performing SPF calculations. You determine that 172.16.20.2 is the source of the 172.16.10.0 route. Using the show ip ospf database router 172.16.20.1 command, you notice that when this show command is performed repeatedly, the contents of the LSA change every few seconds. What could be the cause of this problem?

 

A.       OSPF authentication errors between some of the routers.

B.       Two routers have the same OSPF router ID.

C.       Issues with mistuned OSPF timers.

D.      OSPF LSA pacing issues between some of the routers.

E.       OSPF neighbor adjacency problems between some of the routers.

 

Answer: B

 

 

QUESTION 102

When an OSPF design is planned, which implementation can help a router not have memory resource issues?

 

A.       Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations.

B.       Have a backbone area (area 0) with 4 routers and 30,000 external routes injected into OSPF.

C.       Have less OSPF areas to reduce the need for interarea route summarizations.

D.       Have multiple OSPF processes on each OSPF router. Example, router ospf 1, router ospf 2.

 

Answer: A

 

 

QUESTION 103

The maximum number of routers per OSPF area typically depends on which three factors? (Choose three.)

 

A.       the kind of OSPF areas being implemented

B.       the number of external LSAs in the network

C.       the number of DRs and BDRs in the areas

D.      the number of virtual links in the areas

E.       how well the areas can be summarized

F.        the use of LSA filters

 

Answer: ABE

 

 

QUESTION 104

You are troubleshooting an OSPF problem where external routes are not showing up in the OSPF database. Which two options are valid checks that should be performed first to verify proper OSPF operation? (Choose two.)

 

A.       Are the ASBRs trying to redistribute the external routes into a totally stubby area?

B.       Are the ABRs configured with stubby areas?

C.       Is the subnets keyword being used with the redistribution command?

D.      Is backbone area (area 0) contiguous?

E.       Is the CPU utilization of the routers high?

 

Answer: AC

 

 

QUESTION 105

When verifying the OSPF link state database, which type of LSAs should you expect to see within the different OSPF area types? (Choose three.)

 

A.       All OSPF routers in stubby areas can have type 3 LSAs in their database.

B.       All OSPF routers in stubby areas can have type 7 LSAs in their database.

C.       All OSPF routers in totally stubby areas can have type 3 LSAs in their database.

D.      All OSPF routers in totally stubby areas can have type 7 LSAs in their database.

E.       All OSPF routers in NSSA areas can have type 3 LSAs in their database.

F.        All OSPF routers in NSSA areas can have type 7 LSAs in their database.

 

Answer: AEF

 

 

QUESTION 106

When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?

 

A.       OSPF process ID

B.       OSPF router ID

C.       OSPF network type

D.      OSPF memory usage

E.       OSPF CPU utilization

F.        OSPF stub area configurations

 

Answer: B

 

 

QUESTION 107

Refer to the exhibit.

clip_image001

A network administrator wants to reduce the number of OSPF routes advertised from Area 1 into Area 2.As the router configuration specialist, what two things would you do to accomplish this goal? (Choose two.)

 

A.       Enter the configuration on router B1.

B.       Enter the configuration on router B4.

C.       On the same router, enter the Summary-address 10.10.1.0 255.255.255.128 subcommand.

D.      On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand.

E.       On the same router, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand.

 

Answer: AD

 

 

QUESTION 108

Refer to the exhibit.

clip_image002

 

A company would prefer all Internet-bound OSPF routed traffic to use ISP ABC with ISP DEF as a backup. As the network consultant, what three configuration changes should you make? (Choose three.)

 

A.  The default-information originate command should be configured on router B1 and B4.

B.  The default-information originate command should be configured on router B2 and B3.

C.  If the metric value for ISP ABC is set at the default, the ISP DEF metric value should be set to 1.

D.  If the metric value for ISP ABC is set at the default, the ISP DEF metric value should be set to 25.

E.  The metric type value should be set to type 1.

F.  The metric type value should be set to type 2.

 

Answer: BDF

 

 

QUESTION 109

The administrator wants to verify the current state of the OSPF database loading process. Which show command should the administrator use? Select the best response.

 

A.  show ip ospf [process-id] interface

B.  show ip ospf neighbor

C.  show ip ospf [process-id]

D.  show ip ospf [process-id area-id] database

 

Answer: B

 

 

QUESTION 110

Refer to the exhibit. OSPF is running throughout the network. You want to minimize the propagation of LSAs into and out of Area 1. Which OSPF feature would best achieve this goal?

clip_image003

 

A.       stub

B.       totally stubby

C.       NSSA

D.      totally NSSA

 

Answer: B

 

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