Mobile IP (or IP mobility) is an Internet Engineering Task Force
(IETF) standard communications protocol that is designed to
allow mobile device users to move from one network to another
while maintaining a permanent IP address. Mobile IP for IPv4 is
described in IETF RFC 5944, and extensions are defined in IETF
RFC 4721. Mobile IPv6, the IP mobility implementation for the
next generation of the Internet Protocol, IPv6, is described in
RFC 6275. |Internet protocol suite| The Mobile IP protocol
allows location-independent routing of IP datagrams on the
Internet. Each mobile node is identified by its home address
disregarding its current location in the Internet. While away
from its home network, a mobile node is associated with a care-
of address which identifies its current location and its home
address is associated with the local endpoint of a tunnel to its
home agent. Mobile IP specifies how a mobile node registers with
its home agent and how the home agent routes datagrams to the
mobile node through the tu