LAN medium access control method

How to access and control different computer devices through media in the LAN is preliminarily understood as follows.

A long time ago, Ethernet was used to connect all lines of home computers to the bus to realize the mutual communication of computers. When using this method to send data, you need to specify the target address. When you receive a data frame, you will first compare it with the address of your own adapter (below). If it is the same, you will pass the data and keep it. If it is different, you will discard it.

The above methods are complex. To simplify communication, Ethernet adopts:

(1) . Connectionless working mode: it can communicate directly and send relevant data without requiring the other party to send it back for confirmation.

(2) Using the Manchester encoding form, each symbol is divided into two equal intervals.

CSMA/CD is commonly used in bus LAN and tree networks. Features: multi-point access; Carrier monitoring (detection channel of each station stop listening); Collision detection (side sending to monitoring)

The token bus is commonly used in bus-type LAN and tree-type networks. It forms a logical ring by arranging the workstations in a bus-type or tree-type network in a certain order, such as by the size of the interface address. Only the token holder can control the bus and have the right to send information.

Token ring is used for ring LAN, such as token ring network

The above is the knowledge explanation of the LAN Media Access Control Method brought by Shenzhen Haidiwei Optoelectronics Technology Co., Ltd., a manufacturer of optical communication equipment.