A pooled host pool uses breadth-first load balancing. To support QoS policies for RDP connections to two session hosts, what must you enable?

Enabling RDP Shortpath on Host1 and Host2 is crucial for supporting QoS policies for RDP connections. RDP Shortpath establishes a direct UDP-based transport between the client and the session host, bypassing the RDP Gateway. This direct connection allows for better network performance and enables the implementation of QoS policies, as network traffic can be prioritized more effectively. Modifying the load balancing algorithm setting for Pool1 would change how users are distributed across session hosts, but it doesn't directly enable QoS for RDP connections. Assigning a scaling plan to Pool1 manages the number of active session hosts based on demand, which is unrelated to RDP QoS. Applying an Azure tag on Host1 and Host2 is used for resource organization and management, not for enabling specific RDP features or QoS.