Definition of Net The Internet is the publicly accessible worldwide system of interconnected computer networks that transmit data by packet switching using a standardized Internet Protocol (IP). It is made up of thousands of smaller commercial, academic, domestic and government networks. It carries various information and services, such as electronic mail , online chat , and the interlinked web pages and other documents of the World Wide Web .
In computing, HyperText Markup Language ( HTML ) is a markup language designed for the creation of web pages with hypertext and other information to be displayed in a web browser . HTML is used to structure information — denoting certain text as headings, paragraphs, lists and so on
Definition Definition: A search engine is a searchable database of Internet files collected by a computer program (called a wanderer, crawler, robot, worm, spider).
search engine Spider: Program that traverses the Web from link to link, identifying and reading pages Index: Database containing a copy of each Web page gathered by the spider Search and retrieval mechanism: Technology that enables users to query the index and that returns results in a schematic order
One of the first major attacks in the United States occurred in 1988 with a virus created by a Cornell University graduate student. It jammed more than 6,000 computers across the country, shutting down some networks on what was then a much smaller national computer network.
1 . Never accept disks , programs or data files without checking them first 2. Never use software , demo's or other software with doubtful origins 3 . Always scan any program or document download onto your machine before you open or read it, this includes attachments received via e-mail 4. If you lend a disk to anyone, check it when you get it back. BEFORE you use it again 5. Keep your Antivirus software up to date