Test Sybase ASE connection using only Hostname and password through isql tool

Hello ,

I want to check the Sybase ASE connection only using hostname and password.

I tried using below command which works

isql -Sservername -Hhostname -Uuser -Ppassword -X

if I check with this above command it got connect even if I enter the wrong Hostname.

so I want to verify using hostname like below [without Servername] :

isql -Hhostname -Uuser -Ppassword -X but this doesn't work.

or is there any way so that I can verify whether provided hostname is valid or not ?