This is a connection file (for Windows only) for remote desktop protocol especially made for low speed network. To use this rdp file just extract the zip file, then open the extracted file with notepad and search for “192.168.1.1” and replace it with your RDP/VPS ip and save it.
Now double click on the file, now it should ask for username and password. RDP username is usually “administrator” and the password is included in the service welcome email sent to your email address.
This file make your RDP connection to the RDP (Windows VPS) at the cost of reduced picture quality.