Question about DHCP

> Something that's puzzling me about DHCP and DNS. On the individual
> hosts, be they Linux, Windows, whatever, you have to specify a hostname.
> If this system uses DHCP to get it's IP address, the DNS may or may not
> resolve to the hostname that that specific system identifies itself
> with. Is there a way to make sure that no matter what IP address the
> DHCP server gives a computer, it's name will always be consistent?
>
> Ex: let's say I want to FTP from one system to another. The server side
> just got a new IP lease and I don't know what it is. Can I just FTP to
> <systemname> and access the system I want? Or is this just not possible?
> Should I instead just give permanent IP addresses to those systems that
> will run servers?
>
> I'm also wondering because in the Windows world, the box name is
> consistent, and you can always access it through \\name\share. Granted,
> this is SMB and not DNS, but still...

Windows does this with DDNS (dynamic DNS) under Active Directory. You could
probably get all the systems to do this by setting up a DDNS server and have all
the machines register their hostname with it via scripts.