试题与答案

Networks can be interconnected by differen

题型:单项选择题

题目:

Networks can be interconnected by different devices. In the physical layer networks can be connected by (31) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches which operate at data link layer. They can accept (32) , examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process. In network layer, we have routers that can connect two networks. If two networks have (33) network layer, the muter may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (34) . As an example, gateways between Internet e-mail and X.400 e-mail must (35) the e-mail message and change various header fields.

A.analyze

B.parse

C.delete

D.create

答案:

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AD题目分析:题中材料“这个决议草案, * * 团会议通过后,各代表团进行了审议”,体现了人大代表具有审议权,故A项符合题意,可以入选;题中材料“根据各代表团的审议意见, * * 团会议决定将这个决议草案提请本次...

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