Hubs were a common network infrastructure device used for local area network connectivity but network switches are rapidly replacing hub. These day is vary difficult to spot network hub functioning in live local area network. Hubs are designed to a work with twisted pair
cabling and normally used RJ45 jack to connect the device.Network device are attached to the hub by individual cable. Hubs usually come in different shape and different numbers of ports.
Hubs are considered to operate a physical layer of OSI model . An 8 port hub show below
A Bridge is a network device that typically operates at the data link layer of the OSI modal. A bridge or switch performs the its job by examining the data link layer data packet and forwarding the packet to other devices based on layer 2 addresses.Both switches and bridges
function using data link layer addressing system,also know as MAC addresses.