16.

What was the clock speed of the original IBM PC?
A. Less than 5 MHz B. 10 MHz
C. 8 MHz D. Just over 16 MHz
Answer and Explanation
Answer:A
Explanation: The original IBM PC ran at a breathtaking 4.77 MHz (Smmmmmmokin!) Today there are new PC processors that run faster than 3 gigahertz.
17.

What is NAT?
A. Network Address Translation B. Network Administration Tool
C. Novell Address Transfer D. Newly Added Technology
Answer and Explanation
Answer:A
Explanation: NAT is commonly used by nearly all comsumer routers today, both hardware and software.
18.

What is not always necessary for accessing the Web?
A. A Web browser B. A connection to an Internet Access Provider
C. A computer D. A modem
Answer and Explanation
Answer:D
Explanation: You need a browser, online access and a computer to surf the Web, but if you're on a local area network (LAN) that's connected to the Internet, you don't need a modem to go online.
19.

On what date was the debut of the first IBM Personal Computer?
A. August 12, 1981 B. January 21 1979
C. August 21, 1980 D. January 12, 1982
Answer and Explanation
Answer:A
Explanation: Before IBM created its personal computer, two types of computer systems, Apple II and CP-M, dominated the microcomputer world. Neither of these systems were PC compatible, or Mac-compatible (the two primary standards in place today). The original IBM PC became a new standard in the microcomputer industry. Since then, hundreds of millions of PC-compatible systems have been sold, as the original PC grew into a large family of computers and peripherals. More software has been written for this computer family than for any other system on the market.
20.

A computer virus that actively attacks an anti-virus program or programs in an effort to prevent detection is...
A. Worm B. Retrovirus
C. Trojan D. Ghost virus
Answer and Explanation
Answer:B
Explanation: No answer description available for this question.