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、user
B、host
C、city
D、destination

答案D

解析
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