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What is an advantage of using PVST+?
PVST+ allows Layer 3 load balancing without loops with no configuration
PVST+ reduces the CPU usage and memory demands
PVST+ primary feature is the creation of a separate STP Instance per VLAN. Through careful planning this allows engineers to implement VLAN-Load-Balancing by having one VLAN forward traffic over links that are not forwarding frames in the another VLAN, and vice-versa
PVST+ switches elect a root bridge automatically to enhance bandwidth usage
PVST+ separates an instance of RSTP(802.1w) for each VLAN
PVST+ is an enhancement for Common STP which separates 802.1d spanning-tree instance for each VLAN. This protocol is more efficient on the links, however it causes higher CPU and memory usage.
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