Which Spanning Tree Standard Supports?

802.1D is the original STP standard defined by the IEEE and allows for only one root bridge for all VLANs.

What is an advantage of Pvst +?

What is one benefit of PVST+? PVST+ reduces the CPU cycles for all the switches in the network. PVST+ automatically selects the root bridge location, to provide optimiziation. PVST+ allows the root switch location to be optimized per vlan.

Which is the IEEE STP standard?

STP was originally standardized as IEEE 802.1D but the functionality of spanning tree (802.1D), rapid spanning tree (802.1w), and multiple spanning tree (802.1s) has since been incorporated into IEEE 802.1Q-2014.