how to find server name

How to find server name , i need command .

uname -n
uname --help

hostname

uname -n ==it gives machine name not server name
and
host name == gives current host system

I WANT TO KNOW SERVER NAME

What is the Difference between them ??

Not enough information. Please state the Operating System of the computers involved and how you are connecting between them. Also please make it clear which is the client and which is the server.

If you know the IP address you can try looking up the name with "nslookup".
See:

man nslookup

maybe you mean server model..
try (solaris)

prtdiag