Something clear to me this week was the differences between Viruses, Trojans and Worms. While they are all bad for your computer, they are a little bit different in their actual functions.
Viruses are small programs that are written in order to alter the way a computer operates. They must run without the permission or knowledge of the user. All Viruses execute themselves and replicate themselves. Some types of viruses are File infector viruses, boot sector viruses, master boot record viruses, multipartite viruses and macro viruses.
Trojans are impostors that claim to be something desirable but, in fact, are malicious in nature. An important distinction between Trojan horse programs and viruses is that they do not replicate themselves.
Worms are programs that replicate themselves between systems without using a host file. This is different than viruses, which require the spreading of an infected host file.
For more info check out:
http://www.webopedia.com/DidYouKnow/Internet/2004/virus.asp
Until Next Time,
Zack
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