2. 计算机
  3. An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pas

An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pas

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问题 An internet is a combination of networks connected by  (71) .When a datagram goes from a source to a  (72) ，it will probably pass many  (73) until it reaches the router attached to the destination network．A router receives a  (74) from a network and passes it to another network．A router is usually attached to several networks．When it receives a packet，to which network should it pass the packet? The decision is based on optimization： Which of the available  (75) is the optimum pathway?
选项 A、modems
B、routers
C、switches
D、computers
答案B
解析
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