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

The characteristic of the Dynamic auto switchport mode is that it will trunk with devices that are configured as dynamic desirable or that are set to trunk mode. In this mode, a switch port can automatically attempt to form a trunk link with another device. If the other side is configured to actively seek a trunk (dynamic desirable) or is already set to trunk, the dynamic auto port will negotiate to form a trunk. This makes it flexible in environments where you may not want to statically configure every port, allowing for automatic configuration based on the capabilities of the connected device.

Dynamic auto does not take the initiative to form a trunk like dynamic desirable would; instead, it waits for the opposite port to request it. This is crucial to understand because it shows how different switchport modes interact with each other in a network configuration, impacting scalability and ease of management.