I believe many people have heard the term Ethernet switch, so do you know what an Ethernet switch is? How much do you know about Ethernet switches? Next, the editor of Feichang Technology will give you a detailed introduction to the basic concepts, network interface methods and main features of Ethernet switches. Let’s take a look.
1. Basic concepts
The switching hub, which came out in 1990, can significantly improve the performance of the local area network. Switching hubs are often called Ethernet switches (switch) or layer two switches (indicating that this switch works at the data link layer).
It should be noted that the "Ethernet switch" referred to here refers to a switch with a transmission bandwidth of less than 100Mbps. Below we will also talk about a "Fast Ethernet switch", "Gigabit Ethernet switch" and "10,000 Ethernet switch". "Mega Ethernet switches" are actually Ethernet switches, but they use different protocol standards or transmission media, and of course their interface forms may also be different.
2. Network interface
Ethernet includes three network interfaces:
RJ-45 interface
This interface is the most common application. Because of its simple production of adaptable cable\transmission medium, the transmission rate is fast. The supported duplex working modes are complete.
The transmission medium used by BNC is thin coaxial cable, which is not common at present. Don't think that all Ethernet interfaces are RJ-45 interfaces, but the twisted pair type RJ-45 interfaces are very common in network equipment.
The transmission medium used by AUI is thick coaxial cable. Currently, most radio and television broadband uses coaxial cable as the network transmission medium, and the scope is not wide. In order to take into account the network connection of the coaxial cable medium on the basis of the RJ-45 interface, it is equipped with a BNC or AUI interface.
3. Main features
1. Each port of the Ethernet switch is directly connected to the host, and generally works in full duplex mode.
2. The switch can connect to many pairs of ports at the same time, so that each pair of hosts that communicate with each other can transmit data without conflict as if it were an exclusive communication medium.
3. The bandwidth of the shared transmission media. For a common 10 Mb/s shared Ethernet, if there are N users, the average bandwidth occupied by each user is only one Nth of the total bandwidth (10 Mb/s).
Well, the above content is the detailed introduction of the concept of Ethernet switch, network interface and main features of Feichang Technology, I hope it can be helpful to everyone! Feichang Technology, a professional manufacturer of optical transceivers, optical fiber transceivers, industrial switches, and protocol converters, independently researches and develops brands, welcome to come to understand and communicate.
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