CiscoCisco
350-401 · Question #701
350-401 Question #701: Real Exam Question with Answer & Explanation
The correct answer is B: Listening and learing are transtory port states that use the forward delay timer.. Listening and Learning are transitory STP port states that both utilize the forward delay timer as part of the process before a port can begin forwarding data.
Submitted by skyler.x· Mar 6, 2026Infrastructure
Question
Which statement about STP port states is true?
Options
- AA port in the blocking state remains in that state for 30 seconds before transitioning to the
- BListening and learing are transtory port states that use the forward delay timer.
- CWhen a port transitions to the learning state,it can send and receive data frames.
- DA port in the blocking state learns address and receives BPDUs.
Explanation
Listening and Learning are transitory STP port states that both utilize the forward delay timer as part of the process before a port can begin forwarding data.
Common mistakes.
- A. A port in the blocking state transitions based on the Max Age timer (typically 20 seconds) if it stops receiving BPDUs, or directly to listening if it becomes a designated port, not always 30 seconds.
- C. A port in the learning state can learn MAC addresses but cannot send or receive data frames; data forwarding is only permitted when the port transitions to the forwarding state.
- D. A port in the blocking state receives BPDUs but does not learn MAC addresses; MAC address learning occurs in the learning and forwarding states.
Concept tested. STP port states and timers
Topics
#STP#STP port states#Layer 2 switching
Community Discussion
No community discussion yet for this question.