Scenario: A Citrix Administrator discovers that a user is unable to connect to a Desktop OS machine. While reviewing Citrix Director, the administrator identifies that the Desktop OS machine is marked

rsop.msc displays the Resultant Set of Policy for applied Group Policy settings and does not help test network connectivity or port availability between the VDA and Delivery Controller.

telnet.exe can be used to test TCP connectivity from the Desktop OS machine to the Delivery Controller on ports 80 and 443, verifying whether the VDA can reach the controller at the network level and confirming whether a firewall or routing issue is blocking registration.

netsh.exe is a network configuration and diagnostic tool used for interface and firewall settings, and is not suited for testing application-layer connectivity to a Delivery Controller.

nbtstat.exe is used to troubleshoot NetBIOS name resolution over TCP/IP and does not help diagnose VDA-to-Delivery-Controller registration connectivity.

netstat.exe displays active TCP connections and listening ports on the machine, allowing the administrator to verify whether the VDA has established or attempted connections to the Delivery Controller on the expected registration ports.