300-320 · Question #604
You are using the MST protocol. Which standard protocol is used inside each MST instance to provide fast convergence?
The correct answer is D. 802. 1w. MST (Multiple Spanning Tree, IEEE 802.1s) uses RSTP (Rapid Spanning Tree Protocol, IEEE 802.1w) internally within each MST instance to achieve fast convergence. RSTP provides rapid transitions to the forwarding state using handshake mechanisms rather than timers, enabling…
Question
You are using the MST protocol. Which standard protocol is used inside each MST instance to provide fast convergence?
Options
- A
- 1d
- B
- 1q
- C
- 1s
- D
- 1w
How the community answered
(35 responses)- A3% (1)
- B9% (3)
- C3% (1)
- D86% (30)
Explanation
MST (Multiple Spanning Tree, IEEE 802.1s) uses RSTP (Rapid Spanning Tree Protocol, IEEE 802.1w) internally within each MST instance to achieve fast convergence. RSTP provides rapid transitions to the forwarding state using handshake mechanisms rather than timers, enabling convergence in seconds rather than the 30–50 seconds of classic STP. 802.1d (A) is the original slow STP standard. 802.1q (B) is the VLAN trunking standard. 802.1s (C) is MST itself - the protocol that maps multiple VLANs to a reduced number of spanning tree instances.
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