Computer Virus: A Major Network Security Threat

Computer viruses and worms have been becoming important security threats, over several decades. At present in any organization using computers it is a challenging task to identify and rectify the problems caused by the viruses. This paper begins with the basic structure and mechanisms of computer viruses. Here we present an overview on computer viruses and the different types of threats due to various viruses to the existing computer networks. The sample signature of few viruses is also given.