The Ethernet switch is a switch that transmits data based on the Ethernet, and the Ethernet adopts a local area network with a shared bus-type transmission medium. The structure of the Ethernet switch is that each port is directly connected to the host, and generally works in full-duplex mode. The Ethernet switch function is to connect multiple pairs of ports at the same time, so that each pair of hosts communicating with each other can transmit data without conflict, as if it were a proprietary communication medium.
1. Ethernet switch functions
Ethernet switches are the preferred choice for transmission equipment. In terms of ethernet switch function, because the business development of various industries is more and more dependent on intelligent informatization, Ethernet switches, as an indispensable key device, have not only been greatly improved in quantity, but also in quality, Performance and other aspects continue to improve. Especially for industrial Ethernet switches, industrial Ethernet switches use industrial-grade chips, which can adapt to the working environment of -40 degrees Celsius to 75 degrees Celsius. The power supply adopts a redundant design and can pass strict vibration and impact tests. This is also in line with the unique needs of security systems. The front-end cameras are installed in an outdoor environment. As a switch product for video transmission, they must be able to withstand a wide range of temperature fluctuations, humidity changes, lightning strikes, electromagnetic interference and other harsh factors. In this way, industrial-grade Ethernet Switches have become a must.
The development of Ethernet switches and optical switches is relatively rapid, and it has been faster and faster since optical fiber transmission was applied to network data transmission. You can refer to the data of fiber optic transceivers. So far, fiber optic switches have quickly occupied the market of network transmission equipment with their irreplaceable advantages. With the improvement of modern society's requirements for network networking, safety and security monitoring, traffic monitoring, power transmission and Internet of Things, more and more attention is paid to the safety and stability of transmission equipment. Therefore, the status of fiber optic switches is becoming more and more important.
The fiber optic Ethernet switch is a high-performance managed Layer 2 fiber optic Ethernet access switch. Users can choose all-optical port configuration or optical port hybrid configuration, and the access fiber media can choose single-mode fiber or multi-mode fiber. The Ethernet switch can support network remote management and local management at the same time to realize the monitoring of port working status and switch settings. The optical fiber port is especially suitable for the occasions where the access distance of the information point exceeds the access distance of the five-category line, the need for anti-electromagnetic interference and the need for communication confidentiality. Applicable fields include: residential FTTH broadband access network; enterprise high-speed optical fiber local area network; high-reliability industrial distributed control system (DCS); optical fiber digital video surveillance network; hospital high-speed optical fiber local area network; campus network.
2. Features of ethernet switches
2.1 Each port of an Ethernet switch is directly connected to the host, and generally works in full-duplex mode.
2.2 The switch can connect many pairs of ports at the same time, so that each pair of hosts that communicate with each other can transmit data without conflict like an exclusive communication medium.
2.3 The user monopolizes the bandwidth of the transmission medium. If the bandwidth from one interface to the host is 10Mbit per second, then the total capacity of the switch with 10 interfaces is 100Mbit per second. This is the greatest advantage of switches.
3. Application of ethernet switch
The Ethernet switch is the most common application, the price is also relatively cheap, and the grades are complete. Therefore, the application field is very wide, and they can be seen in large and small local area networks. Ethernet switches usually have several to dozens of ports, which are essentially a multi-port bridge. In addition, its port rate can be different, the working mode can also be different, such as can provide 10M, 100M bandwidth, provide half-duplex, full-duplex, adaptive work and so on.
