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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