I've been sharpening up on my STP, and I came across a section in the CCNA curriculum where it talks about TCN (topology change notification) BPDUs. There was a sentence that got my attention and I wanted to come on here to clarify to make sure I understand correctly. The sentence that triggered this is below:
"In normal STP operation, a switch keeps receiving configuration BPDU frames from the root bridge on its root port. However, it never sends out a BPDU toward the root bridge. To achieve that, a special BPDU called the topology change notification (TCN) BPDU was introduced. " - Cisco Networking Academy - Lan Switching/Wireless Curriculum.
Now to my clarification question:
So once the root bridge is elected and everthing is converged within the STP broadcast domain, the switches now, will only communicate with the root bridge, as where before the election all switches communicate with neighbor switches on their segments.