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* * * simple clear Hand - written digram * * * The problem with supporting mobile devices on the Internet is that the Internet
simple clear Handwritten digram The problem with supporting mobile devices on the Internet is that the Internet is designed to route packets hierarchically. The Mobile IPv protocol was created to address this challenge. The most widely accepted standard for Mobile IPv permits a mobile device to communicate via the Internet in a relatively transparent manner. For example, a laptop computer from UWA that uses IP address when physically located at UWA, may still be contacted, while it is in Sydney, with the IP address A mobile devices IP address must change as it moves from network to network. At the same time, applications require a constant IP address. The apparent conflict is resolved by maintaining two separate addresses for each device. The first is the home address. This is the natural address for the device, the one that resides in the address space of the home network. The home address is assigned by the home network itself and stays with the device longterm. With regard to applications, this is always the IP address of the device. The second address is referred to as the careof address. This address can potentially change from minute to minute as a device travels through several foreign networks. To the routing protocols of the Internet, this is the destination address of the device. Any packets that are destined for the mobile device will be first routed to the home network, since that is the network defined in the home address of the device. Additional software, termed the home agent, will be present in a mobile IPenabled network. The home agent is responsible for intercepting any packets addressed to mobile devices that are not currently at home, and then forwarding those packets to the current careof address for the device. It does this by encapsulating the packet inside another packet destined for the careof address. This packet is then sent via the Internet, where standard routing protocols ensure that it arrives at the foreign network temporarily hosting the device. A foreign agent unwraps the packet and sends it to the mobile device via its home address, which it has associated with a hardware destination address for the device. When the packet arrives at the device, it is accepted as being appropriately addressed; it then travels up the TCPIP stack to the relevant application software. i Draw one or more diagrams showing how a computer, that is neither in the home network nor in the foreign network, can communicate with web server software running on the mobile laptop. On your diagrams draw a number of relevant IP packets, and clearly show all IP addresses included any addresses in encapsulated packets ii With reference to your diagrams outline the potential security challenges associated with Mobile IPv iii Propose and discuss a mechanism to address these potential security challenges.
simple clear Handwritten digram
The problem with supporting mobile devices on the Internet is that the Internet is designed to
route packets hierarchically. The Mobile IPv protocol was created to address this challenge.
The most widely accepted standard for Mobile IPv permits a mobile device to communicate
via the Internet in a relatively transparent manner. For example, a laptop computer from
UWA that uses IP address when physically located at UWA, may still be
contacted, while it is in Sydney, with the IP address
A mobile devices IP address must change as it moves from network to network. At the same
time, applications require a constant IP address. The apparent conflict is resolved by
maintaining two separate addresses for each device.
The first is the home address. This is the natural address for the device, the one that resides in
the address space of the home network. The home address is assigned by the home network
itself and stays with the device longterm. With regard to applications, this is always the IP
address of the device.
The second address is referred to as the careof address. This address can potentially change
from minute to minute as a device travels through several foreign networks. To the routing
protocols of the Internet, this is the destination address of the device.
Any packets that are destined for the mobile device will be first routed to the home network,
since that is the network defined in the home address of the device.
Additional software, termed the home agent, will be present in a mobile IPenabled network.
The home agent is responsible for intercepting any packets addressed to mobile devices that
are not currently at home, and then forwarding those packets to the current careof address
for the device. It does this by encapsulating the packet inside another packet destined for the
careof address. This packet is then sent via the Internet, where standard routing protocols
ensure that it arrives at the foreign network temporarily hosting the device.
A foreign agent unwraps the packet and sends it to the mobile device via its home address,
which it has associated with a hardware destination address for the device. When the packet
arrives at the device, it is accepted as being appropriately addressed; it then travels up the
TCPIP stack to the relevant application software.
i Draw one or more diagrams showing how a computer, that is neither in the home network nor
in the foreign network, can communicate with web server software running on the mobile
laptop.
On your diagrams draw a number of relevant IP packets, and clearly show all IP addresses
included any addresses in encapsulated packets
ii With reference to your diagrams outline the potential security challenges associated with
Mobile IPv
iii Propose and discuss a mechanism to address these potential security challenges.
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