Computer Network (Networking and Internetworking)
Until recently, getting a computer was mostly equivalent to getting a machine that would be used to perform office-related assignments and other calculations. This type of computer was commonly referred to as standalone. A network is a group of computers linked together so that they can share resources such as printers, software programs and documents. Computer network is the interconnectivity of autonomous computers. In order for two computers to share what they have, they must establish some type of communication. This is easily done using a cable and an appropriate object (a network card, also called NIC) inserted in each computer. This means that a cable would go from this object of one computer to the same type of object on the other computer. This is perfectly possible to connect two computers. If you have more than two computers, then you use a type of intermediary object whose job is to direct traffic. This object is called a hub. For example, when one computer A requests to use or open a piece of text that is located in a computer B but to print it in a printer that is connected to a computer C, this intermediary object is able to know what computer has the text, what computer has the printer, and what computer needs these two services. For these reasons, most connections use this intermediary object: the hub There are two types of networking relationship: computer workstations (clients) are connected to a number of central network servers, which allocate resources.