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Building the Mobile Internet by Klaas Wierenga, Kevin Shatzkamer, Mark Grayson

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Chapter 6. Transport/Session Layer Mobility

The TCP/IP transport layer sits above the network layer and is responsible for providing data transport between two end users. While the Open Systems Interconnection (OSI) model defines five classes of transport protocols depending on capabilities1, the two most common transport protocols are Transmission Control Protocol (TCP), documented in RFC 793, and User Datagram Protocol (UDP), documented in RFC 768.

As discussed in Chapter 5, “Network Layer Mobility,” when a mobile node changes point of attachment, the disassociation of the node’s current IP address to that being used by a connection-oriented transport layer protocol for existing connections causes the connection to break. While this is not ...

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