[krylon]

Microsoft's Active Directory, DHCP server, and DNS server integrate very closely. When a domain member gets a dynamic IP address, the DHCP server will inform the DNS server to update its record for that host.

Many companies are, let's say a bit lazy - when use an Active Directory domain anyway, you might as well use the DHCP and DNS servers, too, they handle replication and failover very smoothly. (I am not a big fan of Windows, but that part has worked pretty well in my experience.)

You can get a similar mechanism to work between BIND and ISC DHCPD; it's not a lot of work, but with Zeroconf/mDNS it is less useful than it used to be.