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Informs the mobile node about special features provided by foreign agents, for example, alternative encapsulation techniques. � Lets mobile nodes determine the network number and status of their link to the Internet. � Lets the mobile node know whether the agent is a home agent, a foreign agent, or both, and therefore whether it is on its home network or a foreign network. Mobile nodes use router solicitations to detect any change in the set of mobility agents available at the current point of attachment.

A node increments its sequence number whenever a change occurs in its neighborhood. The OLSR protocol is an optimization for MANET of legacy link-state protocols. The key point of the optimization is the MultiPoint Relay (MPR). By flooding a message to its MPRs, a node is guaranteed that the message, when retransmitted by the MPRs, will be received by all its two-hop neighbors. TBRPF is a link-state routing protocol that employs a different overhead reduction technique­. Each node computes a shortest-path tree to all other nodes, but to optimize bandwidth only part of the tree is propagated to neighbors.

This result in significantly high end-to-end delay and delay jitter, and thus degrades the performance of real-time applications. 3 Interconnection of Mobile Ad Hoc Networks and the Internet The interconnection of mobile ad hoc networks to fixed IP networks is one of the topics receiving more attention within the MANET working group of the IETF as well as in many research projects funded by the European Union. Several ­solutions have recently been proposed, but at this time it is unclear which ones offer the best performance compared to the others.

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