Summary of knowledge on various interfaces on network switches

An introduction to various types of switch interfaces that weak current workers may encounter in actual work.The switch has a very rich interface. Here is some compiled information to share with you.1. RJ-45 interface This interface is our most common network equipment interface now. It is commonly known as "crystal head". The professional term is RJ-45 connector. It belongs to the type of twisted pair Ethernet interface.The RJ-45 plug can only be inserted in a fixed direction, and is equipped with a plastic spring that blocks the RJ-45 slot to prevent it from falling off.This interface can be used in 10Base-T Ethernet, 100Base-TX Ethernet, and 1000Base-TX Ethernet. The transmission media are all twisted pairs, but there are different requirements for the media depending on the bandwidth, especially 1000Base- When connecting to TX Gigabit Ethernet, at least Category 5e cables must be used, and Category 6 cables must be used to ensure stable and high speed.2. SC fiber optic interface The SC fiber optic inter.

3. AUI interface

The AUI interface is specifically used to connect thick coaxial cables. In the early days, such interfaces were used on network cards to connect to hubs and switches to form a network, which is generally not used now.

The AUI interface is a "D" type 15 pin interface that was previously used in token ring networks or bus networks. It can be connected to 10Base-T Ethernet networks using an external transceiver (AUI-to-RJ-45).

4. FDDI interface

FDDI is currently the highest transmission rate among mature LAN technologies, with the characteristics of a timed token protocol, supporting multiple topologies, and using fiber optic as the transmission medium.

Fiber Distributed Data Interface (FDDI) is a set of protocols developed by the National Organization for Standardization (ANSI) in the United States for transmitting digital signals on optical cables. FDDI uses a dual ring token, with a transmission rate of up to 100Mbps.

CCDI is a variant of FDDI, which uses twisted pair copper cables as the transmission medium and typically has a data transmission rate of 100Mbps.

FDDI-2 is an extension protocol of FDDI that supports voice, video, and data transmission. It is another variant of FDDI called FDDI Full Duplex Technology (FFDT), which uses the same network structure as FDDI but can reach a transmission rate of up to 200Mbps.

Due to the advantages of large capacity, long transmission distance, and strong anti-interference ability of using optical fiber as a transmission medium, it is commonly used in backbone networks of urban area networks, campus environments, and multi building networks. Therefore, FDDI interfaces are more common on network backbone switches. With the popularization of gigabit, some high-end gigabit switches have also begun to use this interface.

5. Console interface

We know that this interface is used to configure switches, so only managed switches have it. Moreover, it should be noted that not all network managed switches are available, as there are various configuration methods for switches, such as Telnet command line, web, TFTP, etc.

However, it should be noted that the Console port used for switch configuration is not the same for all switches, and some use the same RJ-45 type Console interface as Cisco routers.