Which command would you use to verify the spanning-tree configuration?

The command that is most effective for verifying the spanning-tree configuration is to use "show spanning-tree." This command provides an overview of the spanning-tree state and its configuration on the switch.

It presents essential information about the spanning-tree instances, including the root bridge information, the bridge priority, the port states, and any regions or VLANs that may have configurations set up. Utilizing this command allows network engineers to quickly assess the spanning-tree topology and identify any issues or misconfigurations.

The other options, while relevant, provide varying levels of detail. For example, "show spanning-tree detail" offers an exhaustive description of every port and its respective state, which can be useful but is more detailed than necessary for a general verification of the configuration. Similarly, "show spanning-tree status" and "show spanning-tree summary" provide focused information but don't encompass the full configuration and overall status that "show spanning-tree" does. Therefore, "show spanning-tree" is the most comprehensive command for a complete verification of the spanning-tree configuration.