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ID number:936478
 
Author:
Evaluation:
Published: 15.11.2004.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Table of contents
Nr. Chapter  Page.
1.  What’s a “Virus”?    1
2.  Types of infection    2
  File infectors    2
  Boot Sector Infectors    3
  Master boot Record Infectors    3
  Multi-partite viruses    3
3.  Some examples of viruses    4
4.  An ounce of prevention    4
Extract

Computer viruses are called viruses because they share some of the traits of biological viruses. A computer virus passes from computer to computer like a biological virus passes from person to person.

There are similarities at deeper level, as well.
A biological virus is not a living thing. A virus is a fragment of DNA inside a protective jacket. Unlike a cell, a virus has a no way to do anything or to reproduce by itself – it is not alive. Instead, a biological virus must inject its DNA into a cell. The viral DNA then uses the cell’s existing machinery to reproduce itself. In some cases, the cell fills with new viral particles until it bursts, releasing the virus. In other cases, the new virus particles bud off the cell one at a time and the cell remains alive,

A computer virus shares some of these traits. A computer virus must piggyback on top of some other program or document in order to get executed. Once it is running, it is then able to infect other programs or documents. Obviously, the analogy between computer and biological viruses stretches things a bit, but there are enough similarities that the name sticks.…

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