Repeater, also known as repeater, is the simplest but most used interconnection equipment. Repeater is only suitable for Ethernet and can interconnect two or more Ethernet segments. The repeater only regenerates and amplifies the data signals transmitted on the cable, and then forwards them to other cable segments. For protocols above the link layer, there is no difference between several cables interconnected by repeaters and a single cable (except that the interrupter itself will cause a certain time delay).
Repeater is a network interconnection device on the physical layer, and its function is to regenerate the signal (that is, to amplify and shape the original signal).
In order to ensure the communication quality, Ethernet uses at most four repeaters, that is, at most five network segments.
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