Switch interface type: RJ-45 interface and SC Optical Fiber Interface

Switch interface type: RJ-45 interface and SC Optical Fiber Interface introduction, this paper explains the main use of RJ-45 interface and SC optical fiber interface, drawing so that everyone can have an understanding. As the main connection device of the LAN, the Ethernet switch is one of the fastest-growing network devices.

At the same time, with this rapid development, the function of the switch is constantly enhanced, and the upgrade of the switch port and the continuous addition of various special device connection ports to the switch, this also makes the vswitch interface types very rich. To give you a clear understanding of these interfaces, We have specially compiled an article on the vswitch interface based on the information:

Switch interface type: RJ-45 Interface

This interface is our most common network device interface, commonly known as "crystal head", professional terminology for RJ-45 connector, belongs to the twisted pair Ethernet interface type. The RJ-45 plug can only be inserted along a fixed direction and is equipped with a plastic shrapnel with a RJ-45 slot stuck to prevent shedding.

This interface can be used in 10Base-T Ethernet, 100Base-TX Ethernet, and 1000Base-TX Ethernet. transmission media are all twisted pair wires. However, different bandwidth requirements apply to different media, especially for 1000Base-TX Gigabit Ethernet connections, at least five cat-5e lines should be used to ensure stability and high speed?

Switch interface type: SC Optical Fiber Interface

The SC optical fiber interface has been applied in the 100Base-TX Ethernet era. Therefore, it was called 100Base-FX (F is short for fiber ), however, at that time, because the performance was not better than that of twisted pair wires, but the cost was relatively high, it was not widely used. Now the industry is vigorously promoting Gigabit Networks, and the SC optical fiber interface has been paid more attention.

Many types of fiber interface, SC Fiber Interface is mainly used for local network switching environment, in some high performance gigabit switch and router provides this interface, it looks very similar to the RJ-45 interface, but SC interface appears more flat, its obvious difference is inside the touch, if it is 8 Fine copper touch, it is RJ-45 interface, if it is a copper column is SC Fiber Interface.

Vswitch interface type: FDDI Interface

FDDI is the highest transmission rate among mature LAN technologies. It has the characteristics of the timing token protocol and supports multiple topology structures. The transmission media is optical fiber. The Optical Fiber Distributed Data Interface (FDDI) is a set of protocols developed by the American Organization for Standardization (ANSI) to send digital signals over optical cables. FDDI uses a dual-ring token, and the transmission rate can reach 100 Mbps.

CCDI is a variant of FDDI. It uses a twisted pair copper cable as the transmission medium, and the data transmission rate is usually 100 Mbps. FDDI-2 is an extended protocol for FDDI that supports voice, video, and data transmission. It is another variant of FDDI, known as FDDI full duplex Technology (FFDT), which uses the same network structure as FDDI, however, the transmission rate can reach 200 Mbps.

Because optical fiber is used as the transmission media with many advantages, such as large capacity, long transmission distance, and strong anti-interference ability, it is often used in the backbone network of man, campus environment, and multi-building network distribution environment, as a result, the FDDI interface of the switch interface type is common in backbone network switches. Now, with the popularization of gigabit, some high-end gigabit switches are also using this type of switch interface.