问题 单项选择题

An internet is a combination of networks connected by  ()  .When a datagram goes from a source to a  () ,it will probably pass many  ()  until it reaches the router attached to the destination network.A router receives a  ()  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  ()  is the optimum pathway.

Which of the available () is the optimum pathway.

A.pathways

B.routers

C.diagrams

D.calls

答案

参考答案:A

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