2. Program flowchart is an outline of the logic of the program you will write.（ ） A. 错误 B. 正确 ...

17. （ ）, executable code that, when run by someone, infects other executable code in a computer. A. Computer Security B. Digital signatures C. Computer virus D. none of the above ...

12. （ ）, in networking, to establish the validity of a user or an object. A. Authenticate B. Decrypt C. Encryption D. Firewall ...

7. （ ）, the process of compressing a file such that,after being compressed and decompressed, it matches its original format bit for bit. A. Lossy compression B. Lossless compression C. Bitmap D. Vector image ...

2. 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. 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 ...

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

5. （ ）, computer shared by several users in a network. A. Protocol B. Server C. Network D. Node ...

9. A location in RAM memory is accessed by its address.（ ） A. 错误 B. 正确 ...

18. （ ）(Complex Instruction Set Computer) refers to the processor architecture found in most conventional mainframes and personal computers. It supports many complex instructions. A. CISC B. RISC C. RAM D. ROM ...