Repeaters extend the communication distance. The maximum number of nodes has been increased. Each network segment can use different communication rates. Improved reliability. When the network fails, it generally only affects individual network segments. The Internet performance is improved.

The repeater is used to extend the network distance in the LAN environment, but it belongs to the network interconnection equipment, and operates on the physical layer of OSI. The repeater has the function of amplifying and regenerating the signal on the line, and is used to extend the length of the LAN segment (only used to connect the same LAN segment).