Term Description
worm worm is a separate computer program that can replicate itself automatically over a network.

Worms are ofren, but not always, malicious and might interfere with the normal use of a computer or a program. They often exploit vulnerabilities in some automatic file sharing feature found on many computers to replicate.

Worm is different than a virus, it does not alter/infect files and its main ability is to replicate by itself. Still, a malicious worm can be programmed to delete all your files just as well.
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