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CCNP exam preparation

Hi !

I'm in my fanal step of preparation of CCNP Exam 642-902 after read boo and doing some labs I had register with some pratice exam questions to check if i'm ready to go or not !

in the following question I'm fully comfortable withe the provide answer and also with the explanation I found on it !

Refer to the exhibit. Router B is performing bidirectional redistribution between EIGRP and OSPF. The network 10.100.1.0/24 should not be reachable from the 10.100.9.0/24 network. However, it needs to be reachable from any network within the EIGRP domain. All other networks should be seen in both domains.
Which change to router B would accomplish these goals?

http://cdn.aiotestking.com/wp-content/uploads/2011/09/642-902-112.png

642-902-112.png

Select the best response.

A.
Under the EIGRP process, insert the distribute-list block_net_1 out ospf 1 command.

B.
Under the OSPF process, insert the distribute-list block_net_1 in serial1/0 command.

C.
Under the EIGRP process, insert the distribute-list block_net_1 in serial1/0 command.

D.
Under the OSPF process, insert the distribute-list block_net_1 out eigrp 1 command.

found explanation :

http://www.aiotestking.com/cisco/2011/09/which-change-to-router-b-would-accomplish-these-goals/

my problem with the explanation is router B connected interface to router C is in AREA 0, all router within the same area must havig the same link state database.  In the provide explanation, I undersood they would not which is not possible in OSPF.

I would prefer to avoid the redistribution of 10.100.1.0/24 in OSPF at all whic wasn't in the available choice !

someone could provide better explanation ?

  • LAN Switching and Routing
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