Computer Science Notes About Virus And Internet Security

Summary:

This note covers the concept of computer viruses and internet security. A computer virus is a small program that spreads from one computer to another and interferes with computer operation and can have destructive effects. Viruses can spread through attachments in email messages, downloads, or pirated software. The article describes various types of viruses, including file infectors, boot sector viruses, macro viruses, worms, and malware programs. The note also discusses the symptoms of a computer virus and ways to protect against viruses, such as using licensed software, updating antivirus regularly, and scanning files before downloading or using them.

Excerpt:

Virus and Internet Security

Introduction:-

Strange as it may sound, the computer virus is something of an Information Age marvel. The virus shows us how vulnerable we are — properly engineered virus can have a devastating effect, disrupting productivity. On the other hand, they show us how sophisticated and interconnected human beings have become.

The full form of VIRUS is Vital Information Resources Under Seize.

A computer virus is a small software program that spreads from one computer to another computer and interferes with computer operation.

A computer virus may corrupt or delete data on a computer, may use an e-mail program to spread the virus from one to another computer, or even delete everything on the Hard Disk. Popular Viruses are April First, Ping Pong, Dark Avenger, I Love you, Stone, etc.

The first virus that came into existence was the Elk Cloner virus. This was created by Richard Skrenta in 1981.

Farooq Alvi Brothers of Lahore, Pakistan created the first PC Virus in 1986. It was a boot sector virus named Brain.

What Does Virus Do?

Viruses have many purposes some are designed to play annoying tricks, whereas others have destructive intent. Some viruses present themselves as a joke while performing secret destructive functions. The two major types of viruses are Compiled Viruses, which are executed by the Operating System, and Interpreted viruses, which are executed by an application.