1、Match the explanations in Column B with words and expressions in Column A.(搭配每组中同意义的词或短语)
交换机 Switch 路由器 Router 组件 Component 传输控制协议 TCP 互联网协议 IP 万维网 WWW 入侵检测和防御系统 IDPS
超文本传输控制协议 HTTP 电子邮件 E-mail 文件传输协议 FTP 防火墙 Firewall 入侵检测系统 IDS 网络安全 Network Safety 开放系统互联 OSI
2、Choose the proper to fill in thebianks.(选词填空)
A LAN is used for communications in a small community in which resources,such as printers,software,and servers,are shared.Each device connected to a LAN has a unique address.Two or more LANs of the same type can also be connected to frammes data frmes among muliple users of other local area networks.In LANs,forward are additional headers appended for local routing.These new-looking packets are known as Packets.
3.Translate the following English into Chinese.(将下面英语句子翻译为中文)
(1）The Intemet is a global system of iterconnected computer networks that use the sandardnemer Interner Protocol Suite (TCP/IP) to seve billions of users worldwide.
互联网是互联计算机网络的全球系统，它使用标准互联网(TCP/IP)为全球十亿用户提供服务
(2) As with most application-layer protocols, SMTP has two sides: a client side, which executes on the sender's mail server, and a server side, which executes on the recipient's mail server.
与大多数应用层协议一样，SMTP有两个方面：在发送的邮件服务器上执行的服务器端
(3) In the star topology, all users are directly connected to a central user through two unidirectional links: one for uplink and the other for downlink.
在星型拓扑中，所有用户通过两条单句链路直接连接到中央用户；一条用于上行链路，另一条用于下行链路
(4) A computer network is a group of computers that are connected to each other for the purpose of communication.
计算机网络是为了通行彼此连接的一组计算机
( 5 ) WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations.
WAN(城域网)用于将(局域网)和其他类的网络连接在一起，一遍一个位置的用户和计算机可以与其他位置的用户和计算机进行通信