Any network other than the mobile node's home network.

Reference used to refer to another processor network. Example: VisaNet , Mapp, etc.

A network which the mobile node is currently visiting.

The network to which the mobile node is attached when it is not attached to its home network, and on which the care-of-address is reachable from the rest of the Internet.

In Diameter Mobile IP applications, service for different geographical areas may be provided by different organizations. To provide uninterrupted service to a Mobile IP user, service delivery may be provided by networks belonging to several organizations as the user transfer travels through different areas. When a mobile node is in an area that is not controlled by the user's organization, the user is in a foreign network (out-of-network).

Any network other than the home network of the mobile node.