Which RDP file feature allows you to connect to CorpCloud1 securely?

The feature that ensures a secure connection to CorpCloud1 using an RDP file is related to being able to encrypt the session during remote desktop connections, which is best done through an encrypted connection. In this context, the appropriate answer is the option that indicates an encrypted connection via HTTPS.

Using a public IP address and port number 3389 alone does not guarantee security; it merely identifies the server and enables connectivity. This method lacks the encryption that safeguards data transmissions and protects against potential interception. In contrast, an encrypted connection via HTTPS ensures that all data transferred between the client and the server is encrypted, significantly increasing security during remote access.

Direct IP connections and firewall exceptions, while important for access, do not themselves provide the necessary layer of encryption to secure the data being transmitted. Firewalls control access but do not inherently encrypt the data, so they play a supportive role rather than a direct one in establishing a secure connection.

Thus, the correct answer focuses on the importance of encrypted connections, as secure RDP sessions rely fundamentally on encryption protocols to protect the data exchanged during remote desktop usage.