4. ( ) ,conversion of either encoded or enciphered text into plaintext. A. Decrypt B. Encryption C. Authenticate D. Hacker ...

9. Asymmetric key(Public Key),in encryption, one key is used to both lock and unlock data.( ) A. 错误 B. 正确 ...

4. A credit card is a plastic card that allows the holder to obtain goods and services on credit terms without the immediate requirement to pay cash.( ) A. 错误 B. 正确 ...

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

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

9. ( ) programs are used to recover deleted or damaged(corrupted) files. A. Data recovery B. System call C. System crash D. System software ...

4. ( ), short for modulator/demodulator, device that converts digital signals into a representation of analog form(modulation) to send over phone lines;a receiving modem then converts the analog signal back to a digital signal(demodula...

9. Upload, to send files from a user's microcomputer to another computer. Compare with download.( ) A. 错误 B. 正确 ...

4. Application software consists of programs that perform specific tasks for users.( ) A. 错误 B. 正确 ...

19. ( ) is the electronic device that interprets and carries out the basic instructions that operate the computer. A. Processor B. hardware C. memory D. CPU ...