Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 71

Which statement is true about RSTP topology changes?

Answer options

• A. Any change in the state of the port generates a TC BPDU.
• B. Only nonedge ports moving to the forwarding state generate a TC BPDU.
• C. If either an edge port or a nonedge port moves to a block state, then a TC BPDU is generated.
• D. Only edge ports moving to the blocking state generate a TC BPDU.
• E. Any loss of connectivity generates a TC BPDU.

Correct answer: B

Explanation

The correct answer is B because only nonedge ports that change to a forwarding state are responsible for generating a TC BPDU in RSTP. Options A, C, D, and E are incorrect as they describe conditions that do not trigger TC BPDUs according to RSTP standards.