3.2.2 - Bridges

CompTIA 3.2.2

An Ethernet bridge works at what layer of the OSI model?

• Data Link Layer (OSI Model Layer 2)

What is its function?

• Establishes separate physical network segments while keeping all nodes in the same logical network.

• This reduces the number of collisions caused by having too many nodes contending for access.

An Ethernet bridge

• Builds a forwarding database to track which addresses are associated with which of its ports.

If no MAC address exists or the frame is a broadcast or multicast:

• The bridge floods the frame to all segments except for the source segment.