(41)is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.(42)is an error detect

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问题 (41)is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.(42)is an error detection code that most data communication networks use. (43)is an interior gateway protocol that uses a distance vector algorithm to propagate routing information.(44)is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media.(45)is an identifier of a web page.

选项 A、ISDN
B、X.25
C、Frame Relay
D、ATM

答案D

解析
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