Which possible configuration will force a switchport to a trunk operational mode when connected to another switch?

When configuring a switchport to enable trunking between two switches, the appropriate setting is the Dynamic Desirable mode. This mode actively attempts to negotiate trunking with the neighboring switch. When the switchport is set to Dynamic Desirable, it sends out Dynamic Trunking Protocol (DTP) frames, requesting the creation of a trunk link. If the other switchport is also capable of trunking (in either Dynamic Auto or Dynamic Desirable mode), the trunk will become operational.

This method is beneficial because it allows for automatic configuration of trunk links, facilitating easier and dynamic network configurations while ensuring compatibility with neighboring devices.

In contrast, settings like Static Access do not enable trunking; they are explicitly for access ports, connecting end devices without trunk capabilities. Dynamic Auto will respond to trunk negotiation requests but does not initiate them, meaning it won't force a trunk link unless the other end is set to Dynamic Desirable. The Disabled state would disable the port, preventing any form of communication, including trunking. Thus, Dynamic Desirable is the most effective and proactive means for establishing a trunk link between switches.