Hw #9 Useful Terms:

1. Conficker:Conficker is a malicious worm that has so far infected 9 million Windows-based PCs since it was a first detected in October 2000. by http://www.eetimes.com/news/semi/showArticle.jhtml?articleID=216402054
   
2. Worm:A computer worm is a self-replicating computer program. It uses a network to send copies of itself to other nodes (computers on the network) and it may do so without any user intervention. Unlike a virus, it does not need to attach itself to an existing program. Worms almost always cause at least some harm to the network, if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targetedcomputer. http://en.wikipedia.org/wiki/Computer_worm
   
3. Patch: a fix for a software program where the actual binary executable and related files are modified.by http://en.wikipedia.org/wiki/Patch
   
4. A backdoor: in a computer system (or cryptosystem or algorithm) is a method of bypassing normal authentication, securing remote access to a computer, obtaining access to plaintext, and so on, while attempting to remain undetected. The backdoor may take the form of an installed program (e.g., Back Orifice), or could be a modification to an existing program or hardware device.by http://en.wikipedia.org/wiki/Backdoor
   
5. Botnet: is a jargon term for a collection of software robots, or bots, that run autonomously and automatically. The term is often associated with malicious software but it can also refer to the network of computers using distributed computing software. by http://en.wikipedia.org/wiki/Botnet