The repeater (Repeater) works at the physical layer of OSI and is the center of all nodes on the local area network. Its role is to amplify signals, compensate for signal attenuation, and support long-distance communication.
The repeater is a small invention. It is designed to give your network signals a boost so that they can travel farther. It's like a drink station in a marathon. When the signal passes through the repeater, the network signal takes a drink, takes a sip, pours the rest on its head, throws away the cup, and jumps into a car if it is certain that no one is seeing them.
Due to the influence of transmission line noise, digital or analog signals carrying information can only transmit a limited distance. The function of the repeater is to regenerate and send the received signal, thereby increasing the distance of signal transmission. It is the simplest network interconnection device, connecting two or more network segments of the same network. For example, Ethernet often uses repeaters to extend the cable length of the bus. The length of each section of standard thin-wire Ethernet is up to 185 meters, and there can be up to 5 sections. Therefore, after adding repeaters, the maximum network cable length can be increased to 925 meters. . In general, the network part at both ends of the repeater is a network segment, not a subnet.
The repeater can connect the cables of two local area networks, retime and regenerate the digital signals on the cable, and then send them out. These functions are typical of the first layer of the ISO model-the physical layer. The function of the repeater is to increase the coverage area of ​​the local area network. For example, the Ethernet standard stipulates that the maximum length of a single-segment signal transmission cable is 500 meters. Up to 2000 meters. Some brands of repeaters can connect cable segments of different physical media, such as thin coaxial cables and optical cables. The repeater only sends the data on any cable segment to another cable, regardless of whether there is erroneous data in the data or data that is not suitable for the network segment.

What is a repeater

Repeater (REPEATER) A repeater is a connection device above the physical layer of the network. It is suitable for the interconnection of two identical networks. The main function is to extend the transmission distance of the network by resending or forwarding the data signal.

The function and working principle of the repeater?

Repeater (Repeater), also known as repeater, is the simplest but also the most used interconnection device. The repeater is only suitable for Ethernet and can interconnect two or more Ethernet segments. The repeater only responds to data messages transmitted on the cable
The signal is regenerated and amplified, and then retransmitted to other cable segments. For protocols above the link layer, interconnected with repeaters
There are no differences between a few cables and a single cable (except that the interrupter itself will cause a certain time delay).

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