A.A Type 4 LSA is not flooded in the area that contains the ASBR.

B.A Type 4 LSA is generated by the ABRs of the area that contains the ASBR.

C.A Type 4 LSA advertises the external networks connected to the ASBR.

D.A Type 4 LSA is not generated in a single area AS.

A.1

B.0

C.2

D.3

A.Use split horizon by default.

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

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

D.Use holddown timers when topologies change to allow for convergence.

A.The DIS creates a logical node to represent a group of routers on the same non-broadcast network; this node is the pseudonode

B.The DIS creates a logical node to represent the complete topology of an IS-IS area; this node is the pseudode

C.The DIS creates a logical node to represent a broadcast sub-network; this node is the pseudonode

D.The DIS creates a logical node to represent the topological database of the backbone network in an IS-IS network; this node is the pseudonode

A.An OSPF database description packet has not been received from the neighbor.

B.The router has not received a valid OSPF Hello packet from its neighbor.

C.The interface facing the neighbor is down.

D.The interface is included in a different area than the neighbor router.