Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 1

What two things occur when an RSTP edge port receives a BPDU? (Choose two.)

Answer options

• A. The port immediately transitions to the forwarding state.
• B. The switch generates a Topology Change Notification BPDU.
• C. The port immediately transitions to the err-disable state.
• D. The port becomes a normal STP switch port.

Correct answer: B, D

Explanation

When an RSTP edge port receives a BPDU, it generates a Topology Change Notification BPDU to inform the network of a change in topology (option B). Additionally, the edge port transitions into a standard STP switch port (option D) to participate in the spanning tree process. Options A and C are incorrect because the port does not immediately transition to forwarding or err-disable states upon receiving a BPDU.