WORM What it is? Is a self replicating virus that does not make any changes to the files but re side active in memory and duplicates. How it works? It uses parts of an operating system that are automatic and usually invisible to the user. How it will be discovered? It will be noticed only when their uncontrolled replication consumes system resources, slowing or halting other tasks. TROJAN What it is? Trojans are harmful programs that perform actions o n the files that have not been author ized by the user. How it works? Trojan can do its chosen form of damage such as deleting data, blocking data, modifying data, c opying data, and disrupting the performance of computers or computer networks. Trojans are not able to self- replicate. How it will be discovered? There are pop-ups keep appearing on your screen even not browsing the Inter net. VIRUS What it is? In computers, a virus is a program or programming code that replicates by being copied or initiating its copying to another program, computer boot sector or document. How it works? Viruses can be transmitted as attachments to an e-mail note or in a downloaded file, or be present on a diskette or CD.
