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The network layer provides services to the transport layer.It call be based on either vir

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The network layer provides services to the transport layer．It call be based on either virtual circuits or datagrams．In both cases，its main job is（）packets from the source to the destination． A．dealing with B．sending C．routing D．receiving

参考答案:

C网络层为传输层提供服务，它基于虚电路或数据报方式，其主要工作是对源节点的数据包进行路由选择(routing)，转发到目的节点。

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