For each blank,choose the best answer from the four choices and write down on the answer sheet. (66) is a protocol that a h

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问题 For each blank,choose the best answer from the four choices and write down on the answer sheet.
     (66) 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 communication 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 non -periodic basis over a range of media.
     (70) is an identifier of a web page.

选项 A、OSPF
B、RIP
C、RARP
D、BGP

答案B

解析
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