its home network. Foreign network A foreign network is the network in which a mobile node is operating when away from its home network. Care-of address The care-of address of a mobile device is the network-native IP address of the device when operating in a foreign network. A home agent is a router on a mobile node’s home network which tunnels datagrams for delivery to the mobile node when it is away from home. It maintains current location (IP address) information for the mobile node. It is used with one or more foreign agents. A foreign agent is a router that stores information about mobile nodes visiting its network. Foreign agents also advertise care-of-addresses which are used by Mobile IP. Binding A binding is the association of the home address with a care-of address. See also GPRS Tunneling Protocol Host Identity Protocol (HIP) Identifier/Locator Network Protocol (ILNP) Mobility management Proxy Mobile IPv6 (PMIPv6) Vertical handoff References External links RFC 2002 – IP Mobility Support RFC 6275 – Mobility support for IPv6 RFC 5944 – IP Mobility Support for IPv4, Revised RFC 4721 – Mobile IPv4 Challenge/Response Extensions RFC 3024 – Reverse Tunneling for Mobile IP Inside Mobile IP Mobile IP explained (a tutorial) Mobility Extensions for IPv6 (mext) IETF Working Group Web site Mobile IPv6 -- A short introduction by Holger Zuleger Linux Mobile IPv6 HOWTO on the Linux Documentation Project D. Johnson, C. Perkins, J. Arkko. Mobility Support in IPv6. RFC 6275. June 2011 J. Arkko, V. Devarapalli, F. Dupont. Using IPsec to Protect Mobile IPv6 Signaling Between Mobile Nodes and Home Agents. RFC 3776. June 2004 The CDG wiki page for Mobile IP Network layer protocols Internet Protocol