Before Mobile IP
Mobile Computing means or refers to a system allow a computer to move from one location to another
IP addressing scheme which was designed and optimized to stationary host ,so it is difficult for mobility
A prefix of each host identifies the network and the routers use this prefix to direct datagram to correct delivery.So moving from a host require to change two thing
Host address must change
Datagram forwarding must change
Two condition used to acquire dynamic address
When it boots it uses DHCP to get IPV4
Problem is all transporting layer connection stop to work when it detect loss the connection
(ie the disadvantage of mobile computing is breaking transport layer connection)
If a host offer to run network services (run server) are assigned with domain name , so when it change location DNS must be updated, but an arbitary computer is not allowed to update DNS entry
Mobility via changes in datagram
In theory we can retain the IP address of host when a host changes it s location , but to do that we need change change forwarding tables in routers through out network
In practical it is not possible because because routing protocol work only for exchange routing information about stationary network
and routing protocol designed to network rather than each host in the network, if we are using Host specific then routing traffic will be overwhelming
After Mobile IP
MOBILE IP
The IETF devised a technology MOBILE IP
By using this technology we can retain our IP address when we change our location.
Advantage
It allows host to not change its IP address and not requiring host specific routing
Disadvantage
Datagram forwarding can be inefficient .
Mobile IP working
Mobile host assumed to have a permanent home in the Internet.And its primary address is assigned to Home address The host contain a special network system Home agent, Home agent agree to intercept each datagram that arrives for the host permanent address and forward datagram to current location(foreign network/secondary address)
Q.h.Describe the various steps involved in optimization of mobile ip.(5marks)[B. Tech. Degree VII Semester Examination November 2012 CS/IT 703 ADVANCED COMPUTER NETWORKS (2006 Scheme)]
Mobile Computing means or refers to a system allow a computer to move from one location to another
IP addressing scheme which was designed and optimized to stationary host ,so it is difficult for mobility
A prefix of each host identifies the network and the routers use this prefix to direct datagram to correct delivery.So moving from a host require to change two thing
Host address must change
Datagram forwarding must change
Two condition used to acquire dynamic address
- First
When it boots it uses DHCP to get IPV4
- Second
Problem is all transporting layer connection stop to work when it detect loss the connection
(ie the disadvantage of mobile computing is breaking transport layer connection)
If a host offer to run network services (run server) are assigned with domain name , so when it change location DNS must be updated, but an arbitary computer is not allowed to update DNS entry
Mobility via changes in datagram
In theory we can retain the IP address of host when a host changes it s location , but to do that we need change change forwarding tables in routers through out network
In practical it is not possible because because routing protocol work only for exchange routing information about stationary network
and routing protocol designed to network rather than each host in the network, if we are using Host specific then routing traffic will be overwhelming
After Mobile IP
MOBILE IP
The IETF devised a technology MOBILE IP
By using this technology we can retain our IP address when we change our location.
Advantage
It allows host to not change its IP address and not requiring host specific routing
Disadvantage
Datagram forwarding can be inefficient .
Mobile IP working
Mobile host assumed to have a permanent home in the Internet.And its primary address is assigned to Home address The host contain a special network system Home agent, Home agent agree to intercept each datagram that arrives for the host permanent address and forward datagram to current location(foreign network/secondary address)
Q.h.Describe the various steps involved in optimization of mobile ip.(5marks)[B. Tech. Degree VII Semester Examination November 2012 CS/IT 703 ADVANCED COMPUTER NETWORKS (2006 Scheme)]
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