10. An （ ） is a company that provides access to the Internet. A. TCP/IP B. APRANET C. FTP D. ISP ...

5. （ ）:In encryption, a two-key system in which the key used to lock data is made public, so everyone can "lock".A second private key is used to unlock or decrypt. A. Asymmetric key B. Symmetric key C. Coputer virus D. Digital signat...

9. Linux is an operating system similar to Unix.（ ） A. 错误 B. 正确 ...

2. View shortcut menus by right-clicking with the mouse.（ ） A. 错误 B. 正确 ...

15. （ ）, type of local area network(LAN) in which all communications devices are connected in a continuous loop and messages are passed around the ring until they reach the right destination. There is no central server. A. Bus network ...

8. （ ）, software used in corporate networks (intranets and extranets) to prevent unauthorized people from accessing the network. A. Firewall B. Modem C. Hypertext D. TCP ...

2. （ ）, the protocol for transferring HTML files on the Web. A. HTML B. ISP C. Client D. Server ...

1. Modern operating systems usually come with a GUI.（ ） A. 错误 B. 正确 ...

9. （ ） performs arithmetic, comparison, and logic operations. It is one part of the CPU. A. RAM B. ROM C. CPU D. ALU ...

3. The （ ） is the communications medium for the entire computer system. A. system board B. input C. output D. bus ...