Patent ID: 7313631

Claim:
A method of operating a network, the network comprising a plurality of interlinked domains, each domain having a DNS name server associated therewith, each domain having a least one subnet, wherein: a mobile terminal is associated with a first domain of said plurality of interlinked domains and a first subnet within said first domain, a DNS name server of said first domain storing a name for said mobile terminal and a first output address of said mobile terminal, which first output address includes an identifying identification of said first subnet, whereby the input to the network of said name for said mobile terminal causes said DNS name server of said first domain to output said first output address; when said mobile terminal moves to a second subnet associated with a second domain of the plurality of interlinked domains, said DNS name server of said second domain stores said name for said mobile terminal and a second output address for said mobile terminal, said second output address including an identification of said second subnet, and said first output address stored in said DNS name server of said first domain is updated with an address of said DNS name server of said second domain, whereby an input to said network of said name for said mobile terminal causes said DNS name server of said first domain to output an address of said DNS name server of said second domain, and causes said DNS name server of said second domain to output said second output address; and when said mobile terminal moves to a third subnet, also within said second domain, said second output address stored in said DNS name server of said second domain is updated with a third output address, said third output address including an identification of said third subnet.