Which spanning tree version does SW1 use in VLAN 10 according to the output?

To determine which spanning tree version SW1 is using for VLAN 10, it is important to understand the characteristics of the various spanning tree protocols.

In the context of spanning tree protocols, if the output indicates that SW1 is running traditional Spanning Tree Protocol, or STP, it means that the switch is utilizing the original IEEE 802.1D specification. STP is known for its slower convergence times compared to its successor protocols. This can lead to longer recovery times in the event of a link failure, which was a significant limitation when STP was widely used.

The other versions, such as Rapid Spanning Tree Protocol (RSTP) and Per-VLAN Spanning Tree Plus (PVST+), offer enhancements over traditional STP, primarily aimed at providing faster convergence and better handling of VLANs. RSTP improves convergence times by replacing the original states used in STP with new ones, whereas PVST+ allows for a separate spanning tree instance for each VLAN, thereby providing better load balancing.

If SW1 is confirmed to be in use with the original STP version for VLAN 10, it means that while it may not benefit from the rapid improvements of RSTP or the VLAN-specific benefits of PVST+, the switch