Virus is a computer program that can copy itself and infect a computer.Each time the infected program is run, the virus is also triggered.It is a Small but insidious piece of programming-code that attacks computer and network systems through ‘contaminated’ (infected) data files, introduced into a system via disks or internet. virus can increase their chances of spreading to other through network file system.
Anti-virus software is a program or set of programs that are designed to prevent, search for, detect, and remove software viruses,
Computer antivirus are:
Kaspersky Anti_virus 2010
Symantec Norton Antivirus 2010
McAfee Antivirus Pro 2010
Panda Security Antivirus Pro 2010
Trend Micro Antivirus + Antispyware 2010
Firewall-They provide some Protection from online intrusion but they don’t protect against some unpatched vulnerability in the application packages.
Cryptographic Techniques-It used to defend data in transit between systems can be intercepted or modified.
Encryption- It is used by the potential characters to find the reachability of an IP Address.
Pinging- It is used by the potential character to find the reachability of an IP Address.
Honey Pots-It is used to catch crackers or fix vulnerabilities.