See virus in Webster''s New World Hacker Dictionary
Because viruses replicate across a network in a variety of ways, they can cause Denial of Service (DoS) attacks in which the victim is not specifically targeted but is an unlucky host. Depending on the type of virus, the DoS can be hardly noticeableÂ—or it can cause a major Âdisaster.
A security expert and content editor for SymantecÂ’s online magazine SecurityFocus notes that as of April 2005, Windows users had experienced more than 140,000 virus attacks, in contrast to the Macintosh Apple users who had experienced none. Some security experts maintain that AppleÂ’s freedom from viruses is caused by a lack of critical mass, but SymantecÂ’s expert thinks it is a combination of AppleÂ’s OS X operating system and its three-tiered user-privilege systemÂ—(i) user, (ii) GUI superuser, and (iii) rootÂ—that is disabled by default. Perhaps that is why, says the Symantec security professional, that Apple experiences a 70% year-over-year growth in Ârevenues.
See virus in Computer
Software used to infect a computer. After the virus code is written, it is buried within an existing program. Once that program is executed, the virus code is activated and attaches copies of itself to other programs in the system. Infected programs copy the virus to other programs.
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