Which value can be changed to make a specific interface the preferred forwarding port?

The port priority is a configurable value used in protocols like Spanning Tree Protocol (STP) to influence which port becomes the designated port (preferred forwarding port) in a segment. A lower port priority value is preferred. If multiple ports have the same priority, the MAC address is used as a tie-breaker. The interface number is a physical identifier and cannot be changed to influence forwarding decisions. VLAN priority is used for Quality of Service (QoS) and affects traffic prioritization within a VLAN, not port forwarding preference in STP. Hello time is an STP timer that determines how often bridge protocol data units (BPDUs) are sent, not a mechanism to select the preferred forwarding port.