Page 78 - M. Abrahim Thesis

Chapter (3) Networking Media and Data Link Layers Protocols

• Listening—In listening state, a port listens to the BPDUs to make sure there are no
loops on the network. No frames are forwarded in this state.

• Learning—In this state, a port learns MAC addresses and builds a address table, but
it does not forward frames.

• Forwarding—A port in the forwarding state forwards frames. BPDUs are sent and
listened to.

• Disabled—A port in the disabled state does not participate in the operation of STP.
Therefore, it does not listen to BPDUs or forward frames.

https://www.youtube.com/watch?v=EFw_ZNdj-w8

88