What mean Virus like Trojan Hourse and Worm?

This article defines the various malware pretty well:

http://www.webopedia.com/DidYouKnow/Inte...

Edit to G:

What's up with this (?) :

''Below you will find some of the various ways that viral related attacks can be transmitted and spread.''

If that's a copy-and-paste, you either went one sentence too long or you stopped too short... and you should cite your source when you C%26P.

What mean Virus like Trojan Hourse and Worm?house call

A Worm is a small piece of software that uses computer networks and security holes to replicate itself. A copy of the worm scans the network for another machine that has a specific security hole. It copies itself to the new machine using the security hole, and then starts replicating from there, as well. The term worm was coined by John Brunner, a science fiction writer, in his 1975 novel Shockwave Rider. The hero, a talented programmer, created self-replicating computer programs that tunneled their way through a worldwide network.

A Trojan Horse is simply a malicious computer program that damages your computer system upon installation. The program claims to do one thing, such as pretending to be a game, but instead do something else when you run them. Some nasty Trojans will actually attempt to erase your hard drive. They were originally named after the historic Trojan horse used by the Greeks to conquer Troy because the first Trojan horse programs pretended to be innocent games or applications. Trojan horses have no way to replicate themselves automatically. Below you will find some of the various ways that viral related attacks can be transmitted and spread.