Cisco Certified Network Professional Practice Test 2026 – Your All-in-One Guide to Exam Success!

The command used to display Spanning Tree Protocol (STP) information is "show spanning-tree." This command provides an overview of the spanning tree status for the VLANs configured on the switch. It displays key information such as the root bridge, designated ports, and the bridge priority, which are essential for understanding the topology of the network and how STP is maintaining loop-free connections.

Using "show spanning-tree detail" would offer a more in-depth view of STP information, including port states, timers, and other detailed attributes. However, the basic command "show spanning-tree" is sufficient to present general STP information, making it the correct choice for a straightforward inquiry about STP status.

In contrast, "show vlan" is focused on VLAN configuration and does not provide STP-specific data, while "show bridge" is not typically utilized in modern Cisco devices for displaying STP information and can vary in output based on the device and its configuration.