Just In case you don't know what DRS is..I will Explain.

DRS - Domain Rename Server

Suppose your Computer has been Assigned an IP Number
and a host name say..."foo". The DRS system on a Network
Will map a host name to a any other IP Number within the
Network. Upon Requesting by suitable authentication through
the port '666' of the DRS machine, the Sytem can immediately rename hosts or swap host names.

For Example If 'foo' is initially 128.0.5.6
Upon Requesting the DRS, it will assign foo to another
IP 128.0.6.10 and you system will now have the host name
'moron'

For More Information
visit
http://www.DRS.net/