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For a link-state routing protocol, which of the following statements about link-state updates is FALSE?

AWhen a link-state update reaches its maximum age on a router, the router will flood that update to its neighbors.

BWhen a router detects that a link-state update has reached its maximum age, it will request a new update from the source router.

CAging helps ensure that routers that are no longer part of the topology will eventually get removed from the link-state database.

DThe age value is updated as the link-state update is flooded throughout the network and when it is in the link-state database

Correct Answer: 1

Which of the following statements regarding the databases used by a link-state routing protocol in a single-are routing domain is FALSE?

AThe link-state database has the local topology and IP reachability information advertised by all the routers.

BThe adjacency database contains information about all the links interconnecting the domain's routers.

CThe forwarding database contains the optimum next hop for each known prefix.

DThe link-state database is the same for all routers.

Correct Answer: 2

Refer to the exhibit.

q3_4A0-112

Static routing is to be used in a network between a corporate head office and a branch office. The head office has many connected subnetworks, whereas the branch office has one subnetwork and a single connection to the head office. Which of the following is the most likely configuration on the head office and branch office routers?

AThe head office has a default route and the branch office has a specific static route.

BThe head office and the branch offices both have specific static routes.

CThe head office and the branch office both have default routes.

DThe head office has a specific static route and the branch office has a default route.

Correct Answer: 3

Refer to the exhibit.

q4_4A0-112

Routers R1 through R4 are running an IGP in such a way that they have each other's system IP addresses in their routing tables. A static route is configured on router R1 so that it can reach subnetwork 10.4.100.0/24. The network administrator decides to use an indirect static route, as shown in the diagram. However, pinging the server from router R1 fails. What may be the problem in this case?

ARouter R1 drops the echo request because address 10.10.10.3 does not belong to an adjacent router.

BRouter R2 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.

CRouter R3 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.

DThe echo request arrives at the server but there is no path for the echo response to return to router R1.

Correct Answer: 4

A routing domain is using a single-area link-state routing protocol. Which of the following is NOT information that a router can share with other routers in the domain using protocol-specific messages?

AThe IP prefixes of subnets directly attached to the router.

BIP prefixes known by the router because it is running ad additional routing protocol.

CA copy of the local routing table.

DThe local router ID and the router IDs of neighboring routers.

Correct Answer: 5

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