What is the transition order of STP states on a Layer 2 switch interface?
A. listening, learning, blocking, forwarding, disabled
B. listening, blocking, learning, forwarding, disabled
C. blocking, listening, learning, forwarding, disabled
D. forwarding, listening, learning, blocking, disabled
Correct Answer: C
Explanation/Reference:
Explanation:
Each interface on a access point using spanning tree exists in one of these states:
Blocking—The interface does not participate in frame forwarding.
Listening—The first transitional state after the blocking state when the spanning tree determines that the interface should participate in frame forwarding.
Learning—The interface prepares to participate in frame forwarding.
Forwarding—The interface forwards frames.
Disabled—The interface is not participating in spanning tree because of a shutdown port, no link on the port, or no spanning-tree instance running on the port.
Reference: http://www.cisco.com/c/en/us/td/docs/wireless/access_point/12-3_7_JA/configuration/guide/i1237sc/s37span.html#wp1040509
