Switch Transmission Mode

- Apr 19, 2019-

The transmission mode of the switch is full-duplex, half-duplex, full-duplex/half-duplex adaptive.

The full duplex of the switch means that the switch can receive data while transmitting data. The two are synchronized. It is as if we usually make a call, and we can hear the other party's voice while talking. Current switches support full duplex. The advantage of full duplex is that the delay is small and the speed is fast.


When it comes to full-duplex, you can't help but mention another concept that closely corresponds to it, that is, "half-duplex". The so-called half-duplex means that only one action occurs in a time period. For a simple example, a narrow At the same time, only one car can pass at the same time. When there are two cars facing each other, in this case, only one can pass first. When the other car is opened again after the first time, this example shows the half. The principle of duplex. Early walkie-talkies, as well as early hubs, were half-duplex products. With the continuous advancement of technology, half-double unions have gradually withdrawn from the historical arena.


Broadly speaking, there are two types of network switches: WAN switches and LAN switches. WAN switches are mainly used in the telecommunications field to provide a basic platform for communication. LAN switches are used in local area networks to connect terminal devices such as PCs and network printers. From the transmission medium and transmission speed, it can be divided into Ethernet switches, Fast Ethernet switches, Gigabit Ethernet switches, FDDI switches, ATM switches and Token Ring switches. From the scale application, it can be divided into enterprise-level switches, department-level switches and workgroup switches. The scale of each vendor is not completely consistent. Generally speaking, enterprise switches are rack-mounted, and department-level switches can be rack-mounted (small number of slots) or fixed configuration, and working groups. The level switch is a fixed configuration (simplified function). On the other hand, from the perspective of the scale of the application, when it is a backbone switch, the switch supporting large enterprise applications with more than 500 information points is an enterprise-class switch, and the switch supporting medium-sized enterprises with 300 information points or less is a department-level switch, and supports 100. The switches within the information points are workgroup switches. The switch described in this document refers to a LAN switch.