Introduction To Hub

A hub is a device that connects multiple Ethernet twisted pairs or optical fibers together under the same physical medium. The hub is the physical layer operating in the OSI model. It can be regarded as a multi-port repeater, if it detects a collision, it will submit a blocking signal.

Hubs are usually attached with BNC and/or AUI adapters to connect to traditional 10BASE2 or 10BASE5 networks.

Since the hub will regenerate or amplify any digital signal received, and then submit it from all ports of the hub, this will cause a great chance of collision between signals, and the signal may also be eavesdropped, and this means that all connected to the hub All devices belong to the same collision domain name and broadcast domain name, so most hubs have been replaced by switches.