Consider the chaining example discussed at the end of Section 7.7.2. Suppose a mobile user visits foreign networks A, B. and C, and that a correspondent begins a connection to the mobile user when it is resident in foreign network A. List the sequence of messages between foreign agents. and between foreign agents and the home agent as the mobile user moves from network A to network B to network C. Next, suppose chaining is not performed, and the correspondent (as well as the home agent) must be explicitly notified of the changes in the mobile user’s care-of address. List the sequence of messages that would need to be exchanged in this second scenario.
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