10. A （ ） is a line rented from a telephone company for the exclusive use of a customer to access Internet. A. leased line B. online payment C. credit card D. ISP ...

5. （ ） is a person who is responsible for authorizing access to the database, for coordinating and monitoring its use, and for acquiring software and hardware resources as needed. A. Database Management Administrator B. Data Integrity...

10. To protect data, you need to implement a data backup and recovery plan.（ ） A. 错误 B. 正确 ...

20. （ ） is a subclass of software. It consists of a collection of programs that control the operations of a computer and its devices. It servers as the interface between the user and the computer hardware. A. System software B. Applic...

15. （ ） is a device that functions as both a router and a bridge. A. Repeater B. Switch C. Gateway D. Brouter ...

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

5. （ ）, 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 ...

10. Windows versions before Windows 95 rely on DOS as the operating system.（ ） A. 错误 B. 正确 ...

5. TCP provides reliable, full-duplex connections and reliable service by ensuring that data is resubmitted when transmission results in an error.（ ） A. 错误 B. 正确 ...

20. （ ） is summarized data or manipulated data. A. Information B. Hardware C. Software D. Procedure ...