Question 1

A router receives an OSPF database description packet from a neighbor that references an LSA, which is already in the router's LSDB. The sequence number in the DBD packet is lower than the sequence number of the LSA in the LSDB.

What action does the router take?

Options :

A : The router sends a link-state update to its neighbor.

B : The router sends a link-state acknowledgement to its neighbor.

C : The router updates the information in its LSDB with the information received from its neighbor.

D : The router sends a link-state request to its neighbor.

E : The router takes no action.

Answer: A

Question 2

Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self', what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

Options :

A : AS Path of 65200 65100, Next Hop of router A.

B : AS Path of 65200 65100, Next Hop of router E.

C : AS Path of 65100, Next Hop of router E.

D : AS Path of 65100, Next Hop of router A.

Answer: C

Question 3

Identify two attributes of Distance Vector Protocols: (Choose two)

Options :

A : Use split horizon by default.

B : Send information about directly connected links to neighbors at periodic intervals.

C : Use holddown timers when topologies change to allow for convergence.

D : Maintain multiple databases: neighbor, topology and routing.

Answer: A,C

Question 4

Click the exhibit.

When router A receives the BGP update for the 192.168.0.1/27 prefix, it propagates it to routers B and C. What action is taken by router B when it receives the update?

Options :

A : Router B propagates the BGP update to routers D and C.

B : Router B propagates the BGP update to router D.

C : Router B detects duplicates in its BGP database and discards the update.

D : Router B propagates the update to routers A, C and D.

Answer: B

Question 5

Click the exhibit button.

The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?

Options :

A : The adjacency state is two way because both routers have received a database description packet.

B : The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.

C : The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.

D : The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.

Answer: C

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