2. 计算机
  3. 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

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、ADSL
B、ATM
C、Frame Relay
D、DDN
答案B
解析
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