Summary of the three functions of the repeater

Summary of the three functions of the repeater

Repeater's many types of products have already been introduced to everyone, then do you have summarized the function of the repeater? In fact, the function of the repeater can be summarized in three aspects. Here are three functions of the repeater.

Repeaters can push network signals to make them transmit farther. Due to transmission line noise, a digital or analog signal carrying information can only transmit a limited distance. The function of the repeater is to reproduce and transmit the received signal, thereby increasing the distance of signal transmission.

It connects two or more network segments of the same network. For example, Ethernet often utilizes the length of the repeater extension bus cable. Standard thin cable Ethernet has a maximum length of 185 meters and can have a maximum of 5 segments. Therefore, after the repeater is added, 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 two LAN cables, re-timing and regenerating the digital signals on the cable, and then send them out. These functions are typical functions of the physical layer in the first layer of the OSI model. The role of the repeater is to increase the coverage area of ​​the LAN.

For example, the Ethernet standard stipulates that the maximum length of a single-segment signal transmission cable is 500 meters, but after using a repeater to connect four-segment cables, the signal transmission cable in Ethernet can be as long as 2000 meters. Some brands of repeaters can connect cable segments of different physical media, such as thin coaxial cables and fiber optic cables.

The repeater only sends data from any cable segment to another cable, regardless of whether the data contains incorrect data or is not suitable for network segment data.

The line of sight transmission and reception of the VHF radio frequency spectrum lines involved. This limitation is a "repeater" that can be overcome. It picks up weak signals and sends them at different frequencies after amplification. Therefore, using a repeater, a low-power user (such as a mobile station) and a direct user-to-user connection in the case where one can communicate can be impossible.

The three major functions of the repeater are basically these, and we can continue to summarize the details in the process of use.

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