| 1.The best way to describe the concept of playing a guitar is use of ( ). |
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| 2.The Internet is the world's largest computer （ ）. |
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| 3.Networks, in terms of transmission technology, can be divided into ( ). |
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| 4.A （ ） infected computer may lose its data. |
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| 5.（ ）：Messages that are sent electronically over a network. |
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| 6.Multimedia will become increasingly ( ) throughout every aspect of our lives. |
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| 7.With （ ） you can communicate in real time with people all around the world． |
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| 8.Multimedia includes ( ). |
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| 9.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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| 10.The （ ） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America. |
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| 11.Which of the following expressions is true about the Internet? |
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| 12.The purpose of the ( ) is to provide fully integrated analog services to users. |
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| 13.Photoshop is the leading professional ( ) program, released by Adobe. |
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| 14.Communication through the Internet, the ( ) performs the reverse function. |
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| 15.The firewall device is a （ ） system for connecting a computer network to other computer network. |
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| 16.A firewall is a （ ） system designed to protect an organization’s network against threats. |
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| 17.A （ ） is used to communicate with another computer over telephone lines. |
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| 18.( ) is used to communicate with another computer over telephone lines. |
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| 19.A （ ） copies a photograph,drawing or page of text into the computer. |
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| 20.Anti-Virus protects your computer from viruses by ( ) your computer's memory and disk devices. |
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