A repeater regenerates amplifies and re-times the signal from one backbone cable to the other. Bridges A bridge is a device that can be added to a network to allow expansion beyond the limitations of 802.3. If your network has a repeater hop of four a bridge can be used to accomplish the addition of new full specification, Ethemet. A bridge operates at the Data Link Layer of the OSI model. It stores packets and, based on the packet destination address forwards or filters the packets.
Bridges can connect only the homogenous networks together.
Ethernet and IEEE 802.3 stations can access the network at any time. If so, the station wishing to transmit waits. If the network is not in use, the station transmits. In this case, both transmissions are damaged and the stations must retransmit. Both Ethernet and IEEE 802.3 LANs are broadcast networks.