Discussion
Mobile IP uses which mechanism to maintain session continuity ?
Answer: B
Mobile IP maintains session continuity through dynamic tunneling.
A mobile node keeps its permanent home address, so connections bound to that address never need to change. When it moves to a foreign network it obtains a care-of address and registers it with its home agent. The home agent intercepts packets sent to the home address and tunnels them, by IP-in-IP encapsulation, to the current care-of address, where they are unwrapped and delivered. Each move simply changes the tunnel's endpoint.
Packet filtering is a firewall function, and proxy switching and route compression are not part of Mobile IP.
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