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Mobile Computing has been a buzzword in the area of computer communications. A technology vital to mobile computing is how to communicate with mobile hosts. This paper proposes a protocol, Virtual Internet Protocol (VIP), that allows hosts to move transparently within the Internet. VIP is defined as an instance of the virtual network protocol, the general protocol supporting mobile hosts. The virtual network protocol is based on the concept of a virtual network and the propagating cache method. VIP is scalable to the total number of mobile hosts and the scale of the Internet, is free from routing loops, and tolerant of loss of control packets. VIP is currently running on operating systems based on 4.3BSD UNIX. The VIP overhead is negligible when compared with IP. 1 Introduction Computer networks such as the Internet have spread worldwide. Computers are getting smaller and smaller. Such an environment allows users to carry portable computers and use them to access networks. Mobile C...
Teraoka et al. (Mon,) studied this question.