Date Added: Jun 2012
In the current Internet, hosts are identified using IP addresses that depend on the topological location of the hosts. In other words, the IP addresses are semantically overloaded since they identify both the hosts and topological locations. These dual operations of the IP address causes problems when the host has to change its IP address due to mobility. The location information changes, but it should not affect the identity information of the host. The Host Identity Protocol (HIP) is rather new concept that separates the identity and location information. The separation is done by introducing a new layer between the transport and network layers of TCP/IP stack called HIP Layer that maps host identifiers to network locators.