题目内容
（请给出正确答案）
[主观题]
is a protocol that a host uses to inform. a router when it joins or leaves an Internet
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 propagate routing information.
(69)is a transfer mode in which all types of information are organized into fixed form. cells on an asynchronous or nonperiodic basis over a range of media.
(70)is an identifier of a web page.
A．ICMP
B．SMTP
C．IGMP
D．ARP
提问人：网友wind00123
发布时间：2022-01-07
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