【专业英语 复习】第8章 Communications and Networks

1. 单选题  

One of the most dramatic changes in connectivity and communications in the past few years has been ____.

A. widespread use of mobile devices with wireless Internet connectivity  

B. chat rooms  

C. satellite uplinks  

D. running programs on remote computers  

正确答案：A  

过去几年中连接和通信方面最显著的变化之一是移动设备与无线互联网连接的广泛使用。

2. 单选题  

A service that uses existing phone lines to provide high-speed connections is called ____.

A. Voiceband  

B. DSL  

C. 3G/4G  

D. WWAN  

正确答案：B  

使用现有电话线提供高速连接的服务称为DSL。

3. 单选题  

This type of network topology does not use a specific physical layout.

A. Hybrid  

B. Mesh  

C. Hierarchical  

D. Tree  

正确答案：B  

这种网络拓扑结构不使用特定的物理布局。

4. 单选题  

Microwave communication uses high-frequency ____.

A. radio waves  

B. satellite communications  

C. optic fibers  

D. infrared  

正确答案：A  

微波通信使用高频无线电波。

5. 单选题  

A network ____ is a device that allows one LAN to be linked to other LANs or to larger networks.

A. switch  

B. gateway  

C. client  

D. server  

正确答案：B  

网络网关是一种允许一个局域网连接到其他局域网或更大网络的设备。

6. 单选题  

Cellular services use ____ to provide wireless connectivity to the Internet for smartphones.

A. DSL  

B. 3G and 4G cellular networks  

C. ADSL  

D. T1 and T3 cellular networks  

正确答案：B  

蜂窝服务使用3G和4G蜂窝网络为智能手机提供无线互联网连接。

7. 单选题  

This type of network strategy uses central servers to coordinate and supply services to other nodes on the network.

A. Personal Area Network  

B. BitTorrent  

C. Client/server  

D. Peer-to-peer  

正确答案：C  

这种网络策略使用中央服务器来协调和提供服务给网络上的其他节点。

8. 单选题  

A ____ is a private network within an organization that is designed to resemble the Internet.

A. extranet  

B. Ethernet  

C. intranet  

D. internet  

正确答案：C  

内部网是一个组织内的私有网络，设计上类似于互联网。

9. 单选题  

In a computer network, this node that requests and uses resources available from other nodes.

A. Server  

B. Host  

C. Client  

D. Directory server  

正确答案：C  

在计算机网络中，请求和使用其他节点资源的节点称为客户端。

10. 单选题  

A ____ is a private network that connects more than one organization.

A. internet  

B. intranet  

C. extranet  

D. Ethernet  

正确答案：C  

外联网是连接多个组织的私有网络。

11. 单选题  

Using this type of communications channel, several users can simultaneously use a single connection for high-speed data transfer.

A. Broadband  

B. Medium band  

C. Voiceband  

D. Baseband  

正确答案：A  

使用这种通信通道，多个用户可以同时使用单一连接进行高速数据传输。

A. 宽带  B. 中频  C. 语音波段  D. 基带

12. 单选题  

____ describes how a network is arranged and how resources are coordinated and shared.

A. Network architecture  

B. Node topology  

C. Base strategy  

D. Proxy structure  

正确答案：A  

网络架构描述了网络的布置方式以及资源的协调和共享方式。

13. 单选题  

In a wireless LAN, all communications pass through the network's centrally located wireless access point or ____ station.

A. gateway  

B. base  

C. node  

D. proxy  

正确答案：B  

在无线局域网中，所有通信通过网络中心的无线接入点或基站。

14. 单选题  

____ transmits data as pulses of light through tiny tubes of glass.

A. Microwave  

B. Cellular  

C. WiMax  

D. Fiber-optic cable  

正确答案：D  

光纤电缆通过玻璃微管以光脉冲形式传输数据。

15. 单选题  

In a communication system, which among the following originate and accept messages in the form of data, information, and/or instructions?

A. Sending and receiving devices  

B. Communication channel  

C. Data transmission specifications  

D. Connection devices  

正确答案：A  

在通信系统中，以下哪个发起和接受以数据、信息和/或指令形式的消息？

16. 单选题  

Which physical connection is the fastest?

A. Fiber-optic cable  

B. Microwave  

C. Coaxial cable  

D. Twisted pair  

正确答案：A  

哪种物理连接速度最快？

17. 单选题  

____ is a term relating to sending data to a satellite.

A. Uplink  

B. Upload  

C. Downlink  

D. Download  

正确答案：A  

____ 是一个与向卫星发送数据有关的术语。

上行链路。

18. 单选题  

All communications between a company’s internal networks and the outside world pass through this server.

A. Proxy  

B. Base station  

C. Node  

D. Supercomputer  

正确答案：A  

公司内部网络与外界之间的所有通信都通过这个服务器。

19. 单选题  

The essential features of this include identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.

A. FTP  

B. HTTPs  

C. TCP/IP  

D. DNS  

正确答案：C  

其基本特征包括识别、发送和接收设备以及将信息分解为小部分以便在互联网上传输。TCP/IP。

20. 单选题  

The actual connecting or transmission medium that carries the message in a communication system is called the ____.

A. connection device  

B. communication system  

C. communication channel  

D. data transmission  

正确答案：C  

在通信系统中承载消息的实际连接或传输媒介称为通信信道。

21. 单选题  

Which among the following is considered a line-of-sight communication medium?

A. Broadcast radio  

B. Satellite  

C. Microwave  

D. Bluetooth  

正确答案：C  

以下哪项被认为是视距通信媒介？

22. 单选题  

The ____ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes.

A. switch  交换机

B. server  

C. gateway  

D. client  

正确答案：A  

____ 是通过在发送方和接收方节点之间直接发送消息来协调数据流的中央节点。

23. 单选题  

The capacity of a communication channel is measured in ____.

A. bandwidth  

B. bit capacity  

C. band rate  

D. data flow  

正确答案：A  

通信信道的容量以带宽为单位测量。

24. 单选题  

____ uses standard telephone lines to provide high-speed connections.

A. Cellular  

B. Cable  

C. Satellite  

D. DSL  

正确答案：D  

____ 使用标准电话线提供高速连接。

25. 单选题  

____ are countrywide and worldwide networks.

A. Cable systems  

B. Local area networks  

C. Wide area networks  广域网

D. Satellite systems  

正确答案：C  

____ 是全国性和全球性的网络。

26. 单选题  

____ is the process of breaking down information sent or transmitted across the Internet into small parts.

A. Identification  

B. Protocol  

C. Bandwidth  

D. Packetization  分组化

正确答案：D  

____ 是将通过互联网发送或传输的信息分解为小部分的过程。

27. 单选题  

A ____ network topology does not use a specific physical layout but requires that each node have more than one connection to the other nodes.

A. mesh  网状网络

B. star  

C. tree  

D. bus  

正确答案：A  

____ 网络拓扑不使用特定的物理布局，但要求每个节点与其他节点有多个连接。

28. 单选题  

Every computer on the Internet has a unique numeric address called a ____.

A. domain address  

B. Web address  

C. IP address  

D. protocol address  

正确答案：C  

互联网上的每台计算机都有一个称为 ____ 的唯一数字地址。

29. 单选题  

In a communication system, which among the following convert messages into packets that can travel across the communication channel?

A. Sending and receiving devices  

B. Storage devices  

C. Connection devices  

D. Secondary devices  

正确答案：C  

在通信系统中，以下哪项将消息转换为可以通过通信通道传输的数据包？

30. 单选题  

The range of Wi-Fi networks using microwave connections is being extended over greater distances using a wireless technology known as ____.

A. WiMax  

B. Bluetooth  

C. RAID  

D. broadcast  

正确答案：A  

使用微波连接的Wi-Fi网络的范围正在通过一种称为 ____ 的无线技术在更大距离上扩展。WiMax。

31. 单选题  

WiMax stands for ____.

A. Worldwide Interoperability for Microwave Access  

B. Wide-area Access for Maximum Reach  

C. Worldwide Access to Maximize Interoperability  

D. Wide-area Range to Maximize Access  

正确答案：A  

WiMax 代表 ____。全球微波接入互操作性。

32. 单选题  

This device enables connectivity between two LANS or a LAN and a larger network.

A. Hub  

B. Node  

C. Network gateway  网络网关

D. Router  

正确答案：C  

此设备可实现两个局域网或局域网与更大网络之间的连接。

33. 单选题  

____ is a high-frequency transmission medium that has a single solid-copper core.

A. Microwave  

B. Twisted pair  

C. Coaxial cable  

D. Fiber-optic cable  

正确答案：C  

____ 是一种高频传输介质，具有单一的实心铜芯。同轴电缆。

34. 单选题  

Most firewalls include a special computer called a ____ server to manage communications between the internal networks and the outside world.

A. client  

B. base station  

C. node switch  

D. proxy  代理服务器

正确答案：D  

大多数防火墙包括一个称为 ____ 服务器的特殊计算机，以管理内部网络与外界之间的通信。

35. 单选题  

____ is the name of the process of converting from analog to digital.

A. Demodulation  解调

B. Optical recognition  

C. Virtualization  

D. Modulation  

正确答案：A  

____ 是从模拟转换为数字的过程的名称。

36. 单选题  

A ____ is a network where the nodes are in close physical proximity to each other.

A. local area network  

B. wide area network  

C. satellite system  

D. cable system  

正确答案：A  

____ 是节点彼此物理接近的网络。局域网。