My server....resolving hostname ?

[SyncMaster]

Hello..
If I have a website say xyz.com, then please tell me how will a query for a sub-domain say abc.xyz.com be handled? Actually, this abc will be a data intended to be sent to my server. So, how do I get it? Do i have to install DNS server for that? If so, how? And, how exactly does it go about.... Please let me know freely of all your suggestions...
Regards.

[Giro]

If you want to setup subdomains on a domain name you can use CNAME entrys on your DNS server.

[deek]

I agree, you will have to add a CNAME to your DNS server. You will also need to add a Virtual Host block to your apache config (assuming you are using apache) to make sure it points to something other than your main domain...

[SyncMaster]

Hi..
well... as I said, the "abc" in abc.xyz.com would be a data that I would be requiring...... this would not be known previously so this cannot be registered. I think this can also be done in the format say www.xyz.com/abc , however I am not sure about it. Please tell me what happens when a request for such a page is done. If this query comes to the dns server of xyz.com then I think the problem might be solved.
Please help.
Thanks.

[Giro]

I think if you say what you want to do it might help, your question is confusing. It sound like you just want to know how DNS works?