Question

How do network bridges scale up a local area network by reducing the collision domain? Why can’t bridges make a local area network collision free?

Answer 1

Bridge connecting device can raise the bandwidth & separate the collision domain on an Ethernet LAN.

Acollision domain is a network segment connected by a shared medium or through repeaters where data packets may collide with one another while being sent. A network collision occurs when more than one device attempts to send a packet on a network segment at the same time.

A collision occurs when two devices send a packet at the same time on the shared network segment. The packets collide and both devices must send the packets again, which reduces network efficiency. Collisions are often in a hub environment, because each port on a hub is in the same collision domain.

A VLAN is a group of switch ports, within a single or multiple switches, that is defined by the switch hardware and/or software as a single broadcast domain. A VLAN's goal is to group devices connected to a switch into logical broadcast domains to control the effect that broadcasts have on other connected devices.