CCNA Practice Exam Test Sample – Question 29

Which port state is introduced by Rapid-PVST?

A. learning
B. listening
C. discarding
D. forwarding

Correct Answer: C
Section: LAN Switching Technologies


PVST+ is based on IEEE802.1D Spanning Tree Protocol (STP). But PVST+ has only 3 port states (discarding, learning and forwarding) while STP has 5 port states (blocking,
listening, learning, forwarding and disabled). So discarding is a new port state in PVST+.