Local area network refers to a computer group that is closely interconnected by multiple computers in a certain area. It is an internal network system that focuses on internal services of enterprises and realizes functions such as file transmission, data transmission and resource sharing.On the other hand, the LAN is a separate broadcast area network, which mainly uses hubs or switches to connect all nodes in the same network segment to form a fast communicationWebsite productionSystem.
Further explanation:
(1) LAN is only a communication network for internal services, and there is no routing problem.Therefore, the LAN can have no network layer equipment, and each node host of the same LAN can communicate directly at the data link layer.
(2) When different LANs are interconnected or communicating, they must go through the network layer services.
2. LAN composition
LAN is mainly composed of servers, workstations, hubs, switches and other simple data communication equipment and communication media.
There are three basic elements of building a LAN: network topology, transmission media, and media access control methods.
3. LAN characteristics
The characteristics of LAN were introduced in Chapter 1, and are further summarized as follows.
(1) The application scope is relatively small, and it is often used for a group, a unit or a department. (2) The LAN generally does not provide external services, has good confidentiality and is easy to manage. (3) LAN has less investment, easy establishment and flexible use. (4) The communication rate of LAN is fast, generally up to 100Mbps, and even 1000Mbps LAN can be built with low delay and low bit error rate (5) All nodes in the LAN are equal to each other, and there is no master-slave relationship (6) LAN adopts broadcast mechanism for communication, and there is no path finding problem