Designing Cisco Enterprise Networks (ENSLD) — Question 79

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 configured VLANs must be grouped in two STP instances. Which standards-based Spanning Tree technology supports this design solution?

Answer options

• A. MSTP
• B. RSTP
• C. Rapid PVST
• D. STP

Correct answer: A

Explanation

MSTP (Multiple Spanning Tree Protocol) allows for multiple VLANs to be mapped to a single STP instance, making it suitable for grouping VLANs into two instances as required in the design. RSTP (Rapid Spanning Tree Protocol) and Rapid PVST (Rapid Per VLAN Spanning Tree) do not support this grouping of VLANs into multiple instances. STP (Spanning Tree Protocol) is the original standard but does not provide the same capabilities as MSTP.