Computer knowledge

   Basic Fundamental Of Internet Overview: In 1969, the Advanced Research Project Agency (ARPA )established a small computer network among different universities and defense organizations, The goal was to establish a large computer network that could survive in war times. There were only four hosts (A host is a computer that provides services to other computers of the networks). But the network grew rapidly and spanned over different countries of the world.  meanwhile, another research organization, the National science foundation,  joined the project.NSF established five supercomputing centers that were available to all researchers for academic purposes, To provide a high-speed network called NSF net. During this period, some other small computer networks had also been established among various universities, colleges, and organizations. The authorities decided to link ARPANET, NSTnet, and other small networks so that they can communicate with each other. This link a...