2019-10-27[鞠明辰]专业英语作业

选词填空

 A LAN is used for cmmications in a small communiy in which resources soch as(printers）,sofiware 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 (froward )data fames among mutiple users of other local area networks. In LANs, (frames ) are additional heders appended for local routing. These new-looking packets are known as ( packets).

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--Email

文件传输协议--Ftp

防火墙--firewall

入侵检测系统--IDS

网络安全--Network Safety

开放系统互连--OSI

将下面英语句子翻译为中文

（1）The Internet is a global system of interconnected computer networks that use thestandard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide.

因特网是一个由相互连接的计算机网络组成的全球系统，使用标准的因特网协议组(TCP/IP)为全世界数十亿用户服务。

（2）As with most application-layer protocols, SMTP has two sides: a client side, whicheutes on the sender's mail server, and a server side, which executes on the recipien's mailserver

与大多数应用程序层协议一样，SMTP有两个方面:客户端(在发送方的邮件服务器上)和服务器端(在接收方的邮件服务器上)

（3）In the star topology, all users are directly connected to a central user through twounidirectional links: one for uplink and the other for downlink.

在星型拓扑中，所有用户都通过两个单向链接直接连接到一个中心用户:一个用于上行，另一个用于下行。

（4）A computer network is a group of computers that are connected to each other for thepurpose of communication.

计算机网络是为了通信而相互连接的一组计算机。

（5）WANS are used to connect LANs and other types of networks together, so that users andcomputers in one location can communicate with users and computers in other locations.

广域网用于将局域网和其他类型的网络连接在一起，以便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通信。