What is one benefit of PVST+?

The correct answer is C. PVST+ allows the root switch location to be optimized per VLAN.. PVST+ (Per-VLAN Spanning Tree Plus) runs a separate spanning tree instance for each VLAN. This means the root bridge can be deliberately placed in the optimal location for each individual VLAN, enabling Layer 2 load balancing. For example, VLAN 10 can use Switch A as root while V

Operate a Medium-Sized Switched Network

Question

What is one benefit of PVST+?

Options

APVST+ supports Layer 3 load balancing without loops.
BPVST+ reduces the CPU cycles for all the switches in the network.
CPVST+ allows the root switch location to be optimized per VLAN.
DPVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.

How the community answered

(53 responses)

B
2% (1)
C
94% (50)
D
4% (2)

Explanation

PVST+ (Per-VLAN Spanning Tree Plus) runs a separate spanning tree instance for each VLAN. This means the root bridge can be deliberately placed in the optimal location for each individual VLAN, enabling Layer 2 load balancing. For example, VLAN 10 can use Switch A as root while VLAN 20 uses Switch B as root, distributing traffic across uplinks. Option A is incorrect because STP operates at Layer 2, not Layer 3. Option B is wrong - PVST+ actually increases CPU usage since it runs multiple STP instances. Option D is wrong because PVST+ does NOT automatically select root placement; the administrator must manually configure bridge priorities to optimize it.

Topics

#PVST+#root bridge placement#per-VLAN spanning tree#load balancing

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