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What is a Computer Network ? A computer network is a system in which multiple computers are connected to each other to share information and resources. Characteristics of a computer network Share Resources from one computer to another Create files and store them in one computer, access those files from the other computer(s) connected over the network Connect a printer, scanner, or a fax machine to one computer within the network and let other computers of the network use the machines available over network. Following is the list of hardware's required to setup a computer network. Network Cables Distributors Routers Internal Network Cards External Network Cards Network Cables Network cables are used to connect computers. The most commonly used cable is Category 5 cable RJ-45. Distributors A computer can be connected to another one via a serial port but if we need to connect many computers to produce a network, this serial connection will not w

Internet 1. Internet is wide network of computers and is open for all. 2. Internet itself contains a large number of intranets. 3. The number of users who use internet is Unlimited. 4. The Visitors traffic is unlimited. 5. Internet contains different source of information and is available for all. Intranet 1. Intranet is also a network of computers designed for a specific group of users. 2. Intranet can be accessed from Internet but with restrictions. 3. The number of users is limited. 4. The traffic allowed is also limited. 5. Intranet contains only specific group information. Therefore the Internet is an open, public space, while an intranet is designed to be a private space. An intranet may be accessible from the Internet, but it is protected by a password and accessible only to authorized users.