| 1.The Internet is the world's largest computer （ ）. |
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| 2.The display screen is the most common ( ) device used to show you what the computer is doing. |
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| 3.A firewall is a （ ） system designed to protect an organization’s network against threats. |
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| 4.The firewall device is a （ ） system for connecting a computer network to other computer network. |
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| 5.You might work for an organization whose computer system is spread ( ) a building. |
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| 6.Computer （ ） is a complex consisting of two or more connected computing units， it is used for the purpose of data communication and resource sharing. |
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| 7.The RGB value is composed of ( ) components. |
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| 8.A computer virus is a computer program that is created to make and spread ( ) of itself. |
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| 9.( ) is a device that enables the computer to handle sounds. |
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| 10.One of the greatest features of a home （ ） is the ability to share one Internet connection simultaneously over two or more computers. |
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| 11.Anti-Virus protects your computer from viruses by ( ) your computer's memory and disk devices. |
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| 12.With （ ） you can communicate in real time with people all around the world． |
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| 13.The usual address for a Web site is the （ ） page address, although you can enter the address of any page and have that page sent to you. |
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| 14.Which of the following expressions is true about the Internet? |
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| 15.A （ ） system placed between the company network and the outside world may limit outside access to the internal network. |
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| 16.Virus is a ( ). |
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| 17.Multimedia will become increasingly ( ) throughout every aspect of our lives. |
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| 18.Multimedia is a ( ). |
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| 19.The purpose of the ( ) is to provide fully integrated analog services to users. |
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| 20.One of the basic rules of computer security is to change your （ ） regularly. |
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