| 1.Data communications equipment (DCE) accepts the serial data stream from the DTE. | |
| | 2.PPM refers to the number of pages that a printer prints per minute. | |
| | 3.We can use multimedia in Education, Edutainment and so on. | |
| | 4.The basic function of transport layer is to accept data from the session layer, and pass them to the network layer. | |
| | 5.The hosts are connected by the cables. | |
| | 6.All virus scanners can kill most known viruses. | |
| | 7.The physical layer is concerned with transmitting raw bytes over a communication channel. | |
| | 8.When you send an e-mail you should provide the sender's e-mail address. | |
| | 9.Video cameras are peripheral. | |
| | 10.In the e-mail a user needs a message transfer agent. | |
| 1.The ( ) is a collection of computers connected together by phone lines allows for the global sharing of information. | |
| | 2.The RGB value is composed of ( ) components. | |
| | 3.( ) is used to communicate with another computer over telephone lines. | |
| | 4.Computer （ ） is a complex consisting of two or more connected computing units， it is used for the purpose of data communication and resource sharing. | |
| | 5.Multimedia includes ( ). | |
| | 6.A （ ） copies a photograph,drawing or page of text into the computer. | |
| | 7.Networks, in terms of transmission technology, can be divided into ( ). | |
| | 8.One use of networks is to let several computers share （ ） such as file system,printers,and tape drives. | |
| | 9.A firewall is a （ ） system designed to protect an organization’s network against threats. | |
| | 10.Communication through the Internet, the ( ) performs the reverse function. | |
| | 11.Network software consists of （ ） , or rules by which processes can communicate. | |
| | 12.The display screen is the most common ( ) device used to show you what the computer is doing. | |
| | 13.The firewall device is a （ ） system for connecting a computer network to other computer network. | |
| | 14.Virus is a ( ). | |
| | 15.( ) is not a linear structure. | |
| | 16.One of the basic rules of computer security is to change your （ ） regularly. | |
| | 17.Modem is ( ). | |
| | 18.Which of the following expressions is true about the Internet? | |
| | 19.The OSI model has ( ) layers. | |
| | 20.The Internet is an open system, and most information is available to everyone. It is very important to add （ ） to existing system for protecting the secret information. | |
| 1.The subnet consists of two basic components:( ). | |
| | 2.Types of media include ( ). | |
| | 3.Which of the following structure is the topology? | |
| | 4.The main areas of network use are ( ). | |
| | 5.The general types of designs for the communication subnet are ( ). | |
| | 6.Data transfer rules include ( ). | |
| | 7.Many viruses do harmful things such as ( ). | |
| | 8.With an Internet connection you can get some of the basic services available are：( ). | |
| | 9.Applications in the Internet can be found everywhere: ( ). | |
| | 10.We can ( ) through the Internet. | |
|
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