2. 计算机
  3. Networks can be interconnected by different devices in the physical layer networks can be connected by (71) or hubs．which just m

Networks can be interconnected by different devices in the physical layer networks can be connected by (71) or hubs．which just m

admin2010-12-16  51
问题 Networks can be interconnected by different devices in the physical layer networks can be connected by (71) 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 (72) ，examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer，we have routers that can connect two networks，If two networks have (73) network layer，the router may be able to translate betweenthe 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 (74) ．As an example，gateways between Internet e-mail and X，400 e-mail must (75) thee-mail message and change various header fields．
选项 A、frames
B、packets
C、packages
D、cells
答案A
解析
转载请注明原文地址:https://kaotiyun.com/show/RBkZ777K
本试题收录于： 网络管理员上午基础知识考试题库软考初级分类
0

网络管理员上午基础知识考试

软考初级

相关试题推荐
随机试题
最新回复(0)