FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -What is a virus? A virus is a computer program that replicates itself by modifying system or application software and then traveling from computer to computer, via disks or a network.

Detailed explanation-2: -A Virus is a self-replicating code segment which must be attached to a host executable. When the host is executed, the virus code may also execute. If possible, the virus will replicate by attaching a copy of itself to another executable.

Detailed explanation-3: -Viruses and worms are malicious programs that self-replicate on computers or via computer networks without the user being aware; each subsequent copy of such malicious programs is also able to self-replicate.

Detailed explanation-4: -Malicious code is an application security threat that cannot be efficiently controlled by conventional antivirus software alone. Malicious code describes a broad category of system security terms that includes attack scripts, viruses, worms, Trojan horses, backdoors and malicious active content.

Detailed explanation-5: -A worm is a malicious program that replicates itself in order to spread to other computers, often in a single network. Worms target groups of connected computers on a network.