Final answer:
To verify server connectivity when using Remote Desktop, use the PING tool.
Step-by-step explanation:
To verify that the server is powered on and connected to the network when using Remote Desktop, the user should use the PING tool. PING is a network utility that sends a series of packets to a specific IP address and measures the time it takes for them to return. If the PING command is successful and receives responses, it indicates that the server is powered on and connected to the network.