(66) is a protocol that a host uses to inform. a router when it joins or leaves anInternet multicast group.(67) is an error detection code that most data conlmunication networks use.(68) is an interior gateway protocol that uses a distance vector algorithm to propagaterouting information.(69) is a transfer mode in which all types of information are organized into fixed form. cells on all asynchronous or nonperiodic basis over a range of medi

A．(70) is an identifier of a web page.(66)

A．ICMP

B．SMTP

C．IGMP

D．ARP(67)

A．4B／5B

B．CRC

C．Manchester Code

D．Huffman Code(68)

A．OSPF

B．RIP

C．RARP

D．BGP(69)

A．ISDN

B．x.25

C．Frame. Relay

D．ATM(70)

A．HTTP

B．URL

C．HTML

D．TAG

[单选题]is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group。A．SMTPB．ICMPC．MIMED．IGMP

[名词解释] 终宿主(final host or definitive host)

[名词解释] Protocol协议

[名词解释] Host Link

[名词解释] 宿主（host）

[名词解释] transport host

[名词解释] 寄主（host）

[名词解释] host宿主机

[单选题] The Border Gateway Protocol (BGP) is an interautonomous system （71） protocol. The primary function of a BGP speaking system is to exchange network （72） information with other BGP system. This network reachability information includes information on

[单选题]The Simple Network Management Protocol (SNMP)is an (71) protocol that facilitates the exchange of management information between (72) ．It is part of the Transmission Control Protocol/Internet Protocol(TCP/IP) protocol suite．SNMP enables network (73)