A.DR Other

B.BDR

C.DR

D.All OSPF neighbors

A.There must be a default route in the routing table of any router

B.If the destination address of the message cannot match any other routing entries in the routing table, the router will forward the message according to the default route

C.The default route can only be manually configured by the administrator

D.In the routing table, the default route appears as a route to the network 0.0.0.0 (the mask is also 0.0.0.0)

A.False

B.True

A.The header of an LSA can uniquely identify an LSA

B.DD packet contains detailed information about LSA

C.The DD packet contains only LSA header information

D.LSA header is only a small part of LSA

A.Netstream

B.SSH

C.web

D.Telnet