Cisco Certified Network Professional 2026 – 400 Free Practice Questions to Pass the Exam

The command that is used to enter the MST (Multiple Spanning Tree) configuration mode is "spanning-tree mst configuration." This command is specifically designed to initiate the configuration of MST, allowing administrators to set parameters governing how spanning tree operates in a network that uses multiple spanning tree instances.

Entering the MST configuration mode is crucial for optimizing network resources and preventing issues associated with loops caused by the traditional spanning tree protocol. By using this command, you can define MST regions and configure VLAN mappings to specific MST instances, which is essential for maintaining efficient network operation, especially in networks with various VLANs and redundant paths.

Other choices do not adhere to the correct syntax or logical structure required by Cisco's command-line interface for entering MST configuration mode. Understanding this command is fundamental when working with MST to ensure network resilience and performance.