2. 计算机
  3. Networks can be interconnected by different devices．In the physical layer，networks can be connected by(66)or Hubs, which just mo

Networks can be interconnected by different devices．In the physical layer，networks can be connected by(66)or Hubs, which just mo

admin2010-01-24  52
问题 Networks can be interconnected by different devices．In the physical layer，networks can be connected by(66)or Hubs, which just move the bits from one network to an identical net-work. One layer up we find bridgas and swiehes, which operate at data link layer. They can accept(67), examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two netwoks. If two networks have(68)network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message(69). As an example, gateways between Internet e-mail and X.400 e-mail must(70) the e-mail message and change various header fields.
选项 A、syntax
B、semantics
C、languages
D、format
答案A
解析
转载请注明原文地址:https://kaotiyun.com/show/uTJZ777K
本试题收录于： 网络工程师上午基础知识考试题库软考中级分类
0

网络工程师上午基础知识考试

软考中级

相关试题推荐
随机试题
最新回复(0)