An administrator needs to submit a network change request to have firewall ports opened to allow users to connect to a Horizon environment using RDP via
Unified Access Gateway with the minimum number of open ports.
Which port selection meets the requirements?
For a Horizon environment using RDP via Unified Access Gateway with the minimum number of open ports, only port 443 needs to be open. Port 443 is used for HTTPS traffic and can tunnel the RDP protocol, fulfilling the requirement with the minimum number of open ports.
TCP 443 only needed. It tunnels RDP. See https://techzone.vmware.com/resource/network-ports-vmware-horizon#external-connection
I personally tested this and you only need 443 open to use RDP when going through the UAG. Answer is D
Answer D. If Blast Extreme is the only display protocol used, the PCoIP and RDP ports need not be opened
The question EXPLICITLY asks for RDP.
It looks HTTPS is enough, so answer is D https://docs.vmware.com/en/VMware-Horizon-7/7.13/horizon-architecture-planning/GUID-ECDCEC31-7621-4C05-ACA3-52E7BA23F876.html