Cisco Certified Network Professional 2025 – 400 Free Practice Questions to Pass the Exam

The description command in interface configuration serves the purpose of providing information about the interface. This command allows network administrators to add a textual description that can help identify the purpose of the interface or note any relevant details that may assist in network management and troubleshooting. For example, a description could indicate the connection type, the device it connects to, or its role in the network architecture.

Having clear descriptions for interfaces can significantly enhance the readability and manageability of the network configuration, especially in large and complex environments. This is helpful when reviewing configurations or monitoring network performance, as engineers can quickly understand the function of each interface without needing to refer to documentation or remember the details themselves.

In contrast, the other options pertain to different functionalities within the interface configuration. Enabling the interface, setting the maximum transmission unit (MTU), or configuring the interface speed all serve specific technical purposes that are distinct from merely annotating the interface's role or function.