When you listen to the news, you hear just about many an some forms of electronic infection. The most common are:
Viruses - A virus is a small piece of computer code that piggybacks on real programs. For example, a virus strength
attach itself to a program such as a computer programme program. Each time the computer programme program runs, the virus runs, too, and it has the chance to reproduce (by attaching to else programs) or make havoc.
E-mail viruses - An e-mail virus moves about in e-mail messages, and ordinarily replicates itself by mechanically
mailing itself to dozens of folk in the victim's e-mail address book.
Worms - A worm is a small piece of computer code that uses computer networks and safety holes to replicate itself. A copy of the worm scans the network for another machine that has a specific safety hole. It copies itself to the new machine victimisation the safety hole, and then starts replicating from there, as well.
Trojan horses - A Trojan horse is just a computer program. The program claims to do one thing (it may claim to be a game) but instead makes damage once
you run it (it may erase your hard disk). Trojan horses have no way to replicate automatically.
