300-320 · Question #330
Which technology guarantees loop free network and does not contain the state "listening"?
The correct answer is A. RPVST+. RPVST+ (Rapid Per-VLAN Spanning Tree Plus) is Cisco's implementation of IEEE 802.1w (RSTP) on a per-VLAN basis. Unlike classic STP (802.1D), which has five port states - Blocking, Listening, Learning, Forwarding, and Disabled - RSTP/RPVST+ consolidates these into three states…
Question
Which technology guarantees loop free network and does not contain the state "listening"?
Options
- ARPVST+
- BSTP
- CVSS
- DMEC
How the community answered
(48 responses)- A92% (44)
- B4% (2)
- C2% (1)
- D2% (1)
Explanation
RPVST+ (Rapid Per-VLAN Spanning Tree Plus) is Cisco's implementation of IEEE 802.1w (RSTP) on a per-VLAN basis. Unlike classic STP (802.1D), which has five port states - Blocking, Listening, Learning, Forwarding, and Disabled - RSTP/RPVST+ consolidates these into three states: Discarding (combines Blocking and Listening), Learning, and Forwarding. The 'Listening' state is eliminated, enabling much faster convergence (typically under 1 second vs. 30–50 seconds for classic STP). Both STP and RPVST+ guarantee a loop-free topology, but only RPVST+ removes the Listening state. VSS and MEC are Cisco high-availability technologies, not spanning tree variants.
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