You have an AVD host pool with 100 session hosts running Windows 10 on general-purpose VMs. You plan to implement Quality of Service (QoS) for the deployment. What should you implement first?

Implementing RDP Shortpath is the correct first step for improving QoS in an Azure Virtual Desktop (AVD) deployment. RDP Shortpath establishes a direct UDP-based transport between the AVD client and the session host, bypassing traditional gateways and significantly reducing latency and improving connection reliability, which are critical for QoS. Configuring a scaling plan is for managing host availability and cost, not directly for improving real-time connection quality. Switching to HPC VMs is unnecessary; general-purpose VMs are typically sufficient, and HPC VMs are designed for specialized, compute-intensive workloads, not general VDI QoS. Upgrading to Windows 11 is a client OS update and doesn't inherently improve the underlying network transport for RDP.