Having a mobile number does not imply that the holder has an IP address. However, most mobile phones today have IP addresses.
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mobile internet protocol
Mobile IP is a standard communications protocol designed to allow mobile device users to move from one network to another while maintaining a permanant IP address.
Type *#06# it shows your IP-address
what are the draw backs of mobile ipv6
Every IP address is unique - there is no single IP covering every mobile phone !
198.168.10.15
6681
Mobile IP has two addresses for a mobile host : one home address and one care of address . The home address is permanent ; the care-of address changes as the mobile host moves from one network to another.
The main requirement for a mobile IP is that the mobile IP has to be compatible with all lower layer used for standard, non mobile, IP. Mobile IP should remain invisible to higher layers and applications. The end systems enhanced by the implementation of mobile IP must be able to communicate with the fixed systems since in current situation fixed systems are in huge amount and working in all over the world. The effects of mobility include higher delay and low bandwidth so there is also a requirement for bandwidth aware applications. The mobility could cause huge routing advertisements that could possibly flood the whole network so special care regarding efficiency is required.