If you try to stage a test case to a remote computer whose hostname cannot be resolved, then the staging will fail.
Both computers must be able to resolve each other's hostnames.
One solution is to add the hostname and IP address of the remote computer to the hosts file of the local computer, and vice versa. The file is /etc/hosts on Linux and %WINDIR%\System32\drivers\etc\hosts on Windows.
Another solution is to set up proper DNS for the remote and local computers. Both computers should have a fully qualified domain name.