Worms are similar in nature to viruses. Both can consume resources and replicate themselves109. The Morris worm or the Internet worm is perhaps the most famous worm. The difference between a worm and a virus is that a worm can replicate itself across a network and consume resources, and it does not need to attach itself to other host programs110. Rather, it is capable of distributing and launching itself on its own, with no inadvertent assistance required from users whose computers are being infected.
As with viruses and Trojan horses, worms can be detected with anti-virus software. (If youve now gotten the hint that you should be running some sort of anti-virus software, no matter how inconvenient it is to isolated users, on your network, good!)
111. http://searchsecurity.techtarget.com/originalContent/0,289142,sid14_gci860185,00.html (Buffer overflows likely to be around for another decade.)
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