A wireless printer is assigned a static IP on the Wi‑Fi network. Which controller/feature must be enabled to avoid connectivity problems?

The correct answer is passive client. A wireless printer with a static IP address does not send out DHCP requests, making it "passive" from the perspective of a wireless LAN controller (WLC). The WLC needs to be configured to recognize and manage these devices without them actively participating in DHCP. Enabling the "passive client" feature allows the WLC to learn the MAC and IP addresses of such devices by observing their traffic, thus preventing connectivity issues. Client exclusion is a security feature that blocks specific clients from connecting. DHCP address assignment is for dynamic IP addresses, which is not the case here. Static IP tunneling is not a standard WLC feature for managing statically addressed clients.