CCNA FAQ: Spanning Tree Protocol Q1. Which of the following IEEE 802.1d port states are stable states used when STP has completed convergence? (Choose two answers.) a. Blocking b. Forwarding c. Listening d. Learning e. Discarding Answer: A and B. Listening and Learning are transitory port states, used only when moving from the Blocking to the Forwarding State. Discarding … [Read more...]