Preliminary Understanding of LAN

LAN is the most popular one we use today. What is LAN? 
A Local Area Network (LAN) refers to a group of computers interconnected by multiple computers in a certain area using a broadcast channel. The more there are in this area, the more devices that can communicate with each other. And only the LAN of the system can communicate. For example, the computer equipment in the LAN of the same switch can be interconnected through a MAC address. 

LAN has many characteristics, making it one of the mainstream: 
Feature 1: The connection range of the LAN is very small, and it is only connected in a relatively independent local area, such as a building or a centralized building group. It can be understood that the rooms in the same building can be connected to each other through elevators. 

Feature 2: The transmission medium (twisted pair, coaxial cable) specially laid is used for networking, and the data transmission rate is high in the range of 10Mb/s to 10Gb/s. For example, in an independent system, whether to walk to different rooms or to reach different rooms by elevator is used. It is related to the hardware design of the network interface used. 

Feature 3: Short communication delay, low bit error rate, and high reliability. 
Feature 4: All stations are equal and share the transmission channel. 
Feature 5: It uses distributed control and broadcast communication, and it can be used for both broadcast and multicast. 

The main things that make up a LAN are its network topology, its transmission media, and its methods for controlling access to the media. 

The above is the knowledge explanation of the preliminary understanding of LAN brought by Shenzhen HDV Phoelectron Technology Co., Ltd., a manufacturer of optical communication equipment.