The active logical interface count for Switch A is 202 based on the spanning-tree scalability method used for logical ports. In STP design, a logical port is counted per active VLAN instance on each active trunk or access interface. A trunk carrying multiple VLANs therefore consumes multiple logical STP ports, while an access link normally consumes one logical STP port for its VLAN. Cisco campus design guidance uses logical-port counts to ensure that the selected STP mode and platform stay within supported scalability limits. The calculation in the exhibit produces 202 active logical interfaces for Switch A, not simply the number of physical links. Answer A counts only physical interfaces and ignores VLAN instances. Answer D is too low because it does not account for all active VLANs across the relevant links. Answer B overstates the count by including VLANs or links that are not active for Switch A. Reference topics: STP scalability, logical ports, VLAN instances, trunk design, Layer 2 campus sizing.