2. Decrypt, the process of changing plaintext data into enciphered text through an algorithm. A. 错误 B. 正确 ...

7. ( ) means buying and selling products and services online via the Internet. A. Electronic Commerce B. Credit card C. Online payment D. none of the above ...

2. An ( ) is a language translator that converts each high-level language statement into machine language and executes it immediately. A. interpreter B. JAVA C. C++ D. C E. none of the above ...

7. WAN is an acronym for local area network.It is a group of computers and other devices dispersed over a relatively limited area and connected by a communications link. A. 错误 B. 正确 ...

2. In full-duplex mode, the communication is unidirectional, like a one-way street. Only one of the two stations on a link can transmit;the other can only receive. A. 错误 B. 正确 ...

7. ( ), communications network that covers a geographic area with a size of a city or a suburb. A. MAN B. LAN C. WAN D. none of the above ...

2. ( ), also called communications network; a system of interconnected computers, telephones, or other communications devices. A. Protocol B. Node C. Packet D. Network ...

7. A keyboard is the primary input device. It is used for entering letters, numbers and commands into the system. A. 错误 B. 正确 ...

2. A computer is an electronic device that operates under the control of instructions stored in its own memory, which can according to specified rules, produce results,and store the results for future use. A. 错误 B. 正确 ...

7. ( ) is the electronic device that interprets and carries out the basic instructions that operate the computer. A. Processor B. Keyboard C. USB D. none of the above ...