A computer network or data network is a telecommunications network that allows computers to exchange data. In computer networks, networked computing devices transmit data to each other using data connections. These connections are made with nodes using a cable or via wireless media. The best known and most interesting computer network is the Internet. There are many types of computer networks, from local area networks (LAN), wide area networks (WAN), campus networks (container networks), metropolitan area network (MAN) and home area networks (HAN). With the massive uprising of PCs in the early 1980s, the LAN system developed rapidly. The LAN system on a workstation can operate via a short network cable. Local networks are made up of computer units linked to a control computer called a server. Network technology is the means by which many stations are linked together. The LAN can be linked to larger networks, including the mainframe. This allows LAN users to access enormous computing power and excellent communication facilities. Computerization in banking system is the best example of LAN. When you link the computer system to ensure greater distance or extended geographic area, such as long distance or countries for information exchange, the formation is called wide area network (WAN). ). These are mainly additions of LAN connections via telephone and satellite links. A router and software required to create the link. The computer network is armed with communication between computer systems or devices. A computer network is any set of computers or devices linked together with the capacity to exchange data. It is sometimes considered a sub-discipline of telecommunications, middle of paper......benefiting from virtually free access to the Internet. Worse still, the stability of these networks is worrying; the sheer volume of data circulating on the Internet could prove too much for them. Worse still, there is no guarantee that these networks will be connected. Probably, but he doesn't have to. In one fell swoop, government leaders have destroyed probably the most established network of free forums. Computer networks, assuming they exist in the future (if nothing happens on the Internet), may not be the ultimate solution - all that hype. media may suggest, but these are certainly revolutionary tools that will change the way we access information and perceive the world around us. Commercial interests will be overwhelming because we are bombarded with information. But useful, the interest will always be accessible - the problem you need to identify .