Goto run->type CMD
IN CMD type
ping target_ip_of_the_server
or
ping myip
Now you will see several ping requests coming
We Are interested in seeing the TTL time which you can see at the end of each request in ping.
NOTE:-
1) If TTL <64 then the server is Linux based
2) If TTL>64 but <128 then the server is Windows bsaed
3) TTL>128 Mac and others.
