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4 Cards in this Set
- Front
- Back
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Explain tunnelling. |
Tunneling a process where IP datagram is encapsulated with outer IP header so it's transmitted across the Internet using the destination address and parameters of the outer header. |
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List and briefly define the capabilities provided by Mobile IP. |
Discovery: A mobile node uses a discovery procedure to identify prospective home agents and foreign agents. Registration: A mobile node uses an authenticated registration procedure to inform its home agent of its care-of address. Tunneling: Tunneling is used to forward IP datagrams from a home address to a care-of address. |
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Explain the distinction between a mobile user and a nomadic user. |
A mobile user is connected to one or more applications across the Internet such that the user's point of attachment changes, and that all connections are automatically maintained. For a nomadic user, the user's Internet connection is terminated each time the user moves and a new connection is initiated when the user dials back in. |
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What are the purposes of the HLR and VLR is mobile networks? Which elements of mobile IP are similar to the HLR and VLR? |
GSM home network has a database called the home location register (HLR), which contains the permanent cell phone number and subscriber profile information about each of its subscribers. The visited network maintains a database known as the visitor location register (VLR) that contains an entry for each mobile user that is currently in the portion of the network served by the VLR. The edge router in home network in mobile IP is similar to the HLR in GSM and the edge router in foreign network is similar to the VLR in GSM. |
