Definition and benefits of mobile IP

Definition of mobile IP:

IP(Mobile IP is a network protocol that allows mobile devices to keep their IP addresses unchanged when changing their physical locations. It is formulated by the Internet Engineering Task Force (IETF), and its purpose is to enable users of mobile devices to maintain connectivity during the mobile process and realize the roaming function across different network segments.

Benefits of mobile IP:

Keep the IP address unchanged: The mobile node can keep its IP address unchanged during the movement, which is very important for maintaining the existing TCP connection, because the TCP connection is based on the IP address.

Communication continuity: Even if mobile devices move between different networks or physical transmission media, mobile IP can ensure communication continuity.

Reduce the expansion of routing table: there is no need to set a specific host route for each mobile node, thus avoiding the rapid expansion of routing table.

Support multiple media: Mobile IP can provide mobile functions among multiple media, such as wireless local area network and cellular network.

Extensive mobility support: support for mobility can be provided in a wide range, not only in local areas.

Security: Mobile IP protects the communication security of mobile nodes by using security association and authentication mechanisms.

Network layer solution: Mobile IP is a network layer solution, which does not require any lower transmission media, and can provide host mobility between networks with different media, while shielding the details of host mobility from the upper layer.

Mobile IP is realized by tunneling technology, which allows data packets to be transmitted between mobile devices and their home networks, even if the devices have moved to other networks. This technology enables mobile devices to participate in network communication like fixed devices, regardless of their actual physical location.