The Mobile IP protocol covered in the lecture utilizes indirection where packets

are routed through a home agent rather than directly to the mobile host. This

approach has a notable limitation: whenever the mobile host connects to a new

network, it must send registration messages back to the home agent to update

its location. For example, if a user typically resides in Sydney but is currently

traveling in San Francisco, every time the user connects to a different network,

the registration message must be sent across the Pacific Ocean to the home agent

in Sydney. This results in potential inefficiencies and increased latency. Suggest

a technique that can eliminate the inefficiency of sending registration messages

back to the home agent without altering the Mobile IP protocol itself.

Do not give me lengthy answers. Keep it short and accurate.

Please mention the references where required.