LAN is the joint operation of several individual computer work stations to a single data channel. Thanks to computer networks at the same time we were able to use software and databases for multiple users.
   The concept of a local area network - LAN refers to a geographically limited hardware and software implementation, in which a number of computer systems are connected to each other by an appropriate means of communication. Due to this connection, the user can communicate with other workstations that are connected to the LAN.
   In industrial practice LAN play a very big role. Through LAN in combined personal computers located in many remote locations, which are used together hardware, software and information. Jobs of employees are no longer isolated and combined into a single system.