An engineer is designing an enterprise campus network. The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism. All…

MSTP (Multiple Spanning Tree Protocol), defined by IEEE 802.1s, is a standards-based protocol that supports the creation of multiple Spanning Tree Instances (MSTIs), allowing administrators to group and map various VLANs to specific instances, which perfectly fits the requirement for a multi-vendor environment.

RSTP (Rapid Spanning Tree Protocol), defined by IEEE 802.1w, is a standards-based protocol that offers faster convergence than traditional STP but supports only a single common Spanning Tree instance for all VLANs, making it unsuitable for grouping VLANs into multiple instances.

Rapid PVST+ is a Cisco proprietary implementation that runs a separate Spanning Tree instance for each VLAN, meaning it does not adhere to open standards and would create many more than two instances if there are numerous VLANs, rather than grouping them.

STP (Spanning Tree Protocol), defined by IEEE 802.1d, is the original standards-based protocol but offers slow convergence and only supports a single common spanning tree for all VLANs, failing to meet the requirement for grouping VLANs into distinct instances.