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Repeater Working Principle
May 31, 2017

 Repeater Repeater work principle, repeater (RP repeater) is working in the physical layer of the connection device. For the same two types of network interconnection, the main function is through the data signal to send or forward, to expand the network transmission distance. The repeater is a network device that reproduces and restores the signal: the physical layer device of the OSI model.

  Repeater is used in the LAN environment to extend the network distance of the most simple and cheap network interconnection equipment, operating in the OSI physical layer, the repeater on the line signal amplification function, for the expansion of the LAN segment Length (only for connecting to the same LAN segment).

  Repeater (RP repeater) is connected to the network line of a device, commonly used in two network nodes between the two-way physical signal forwarding work. Repeater to complete the main function of the physical layer, responsible for the two nodes in the physical layer by bit to pass information to complete the signal replication, adjustment and amplification, in order to extend the length of the network. Due to the loss, the signal power transmitted on the line will gradually decay, decay to a certain extent will cause the signal distortion, it will lead to receiving errors. The repeater is designed to solve this problem. It completes the physical line connection, the attenuation of the signal to enlarge, keep the same as the original data. Under normal circumstances, the two ends of the repeater is connected to the same media, but some repeaters can also complete the transfer of different media work. Theoretically, the use of repeaters is infinite, so the network can be infinitely extended. In fact, this is not possible, because the network standard in the delay range of the signal made a specific provision, the repeater can only within the scope of this effective work, otherwise it will cause network failure

  The purpose of the repeater design is to give you the network signal to push so that they are transmitted farther.

  Repeater Due to the influence of transmission line noise, the digital signal or analog signal carrying information can only transmit a limited distance. The function of the repeater is to regenerate and transmit the received signal, thus increasing the distance of signal transmission. It connects two or more segments of the same network. For example, Ethernet often uses the repeater to extend the cable length of the bus. The length of the standard cable Ethernet is 185 meters long and can have up to 5 segments. Therefore, the maximum network cable length can be increased to 925 meters The In general, the network part of the repeater is the network segment, not the subnet.

  The repeater can connect two LAN cables, re-timed and regenerate the digital signals on the cable, and then send them out, which is the first layer of the OSI model - a typical function of the physical layer. The role of the repeater is to increase the coverage area of the LAN. For example, the Ethernet standard specifies that the maximum length of the single-stage signal transmission cable is 500 meters. However, after connecting the 4-segment cable with the repeater, the maximum signal transmission cable in the Ethernet Up to 2000 meters. Some brands of repeaters can be connected to different physical media cable segments, such as fine coaxial cable and cable.

  The repeater only sends data from any cable segment to another cable regardless of whether there is any data in the data or data that is not suitable for the segment.


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