A.Netstream

B.Telnet

C.SSH

D.Web

A.ARP request message is sent by broadcast

B.ARP reply message is sent by unicast party
Any link layer protocol needs ARP protocol to assist in obtaining data link layer identification

C.ARP packets cannot be forwarded to other broadcast domains

A.Router C

B.Router D

C.Router A

D.Router B

A.The router is configured with the same process ID

B.The router is configured with the wrong Router ID

C.The router is configured with the same area ID

D.These two routers are DR0ther routers in the broadcast network

A.The LSA header is only a small part of the LSA

B.DD packet contains detailed information about LSA

C.DD packets only contain LSA header information

D.The header of the LSA can uniquely identify an LSA