Computer concept

Computer network, refers to the location of a plurality of different computer and peripheral device having an independent function, are connected via a communication line, in the network operating system, management and coordination of network management software and a network communication protocol, resource sharing, and computer system information transfer. Briefly, the computer network is the more than two computers by cable, telephone line or wireless communication to the set of interconnect. Development of computer networks has gone through terminal face of the single-wide computer networks, computer networks, computer networks and computer network open standardization in three stages. More simply is a computer network by a plurality of computers (computer or other network device) connected through a transmission medium composed of software and physical (or logical). Overall composition essentially a computer network comprising: a computer, network operating system, the transmission medium (which may be tangible or intangible, such as wireless network transmission medium is air) and corresponding application software four parts. On the definition is very simple: the network is the computer group linked by some form. A network may consist of two computers, you can have thousands of computers and users in the same building inside. We usually refer to this as a local area network (LAN, Local Area Network), and then extended out from the LAN larger scale, such as whole cities and even entire countries, we call such a network wide area network (WAN, Wide Area Network), of course you are If carefully divided again, you can also have a MAN (Metropolitan Area network) and cAN (Citywide Area network), these networks require a dedicated management staff for maintenance. And we most often touch the Internet is these myriad composed of LAN and WAN. Internet only provides a connection between them, but there is no specific person to manage (in addition to the maintenance and development of connections using standard external), it can be said Internet is the freest and most did not place pipe king. Internet has no borders at the top of the points race, as long as even go up, the other side of the Earth in computer and your roommate's computer is actually no different. Because we are the most commonly used or LAN, (even though we are from home connected to the Internet, in fact, is the first ISP to connect to the LAN), LAN-based or in so here we mainly discussed. LAN can be said of many of the most basic units inside the network, and so you have some knowledge of LAN, WAN and the Internet go to understand it is easier to start with, but need to know more and more sophisticated means of communication only.