Protocol - Slides (R1)

Protocol - Slides (R1) - CSCI 232 CSCI 232 Computer...

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SCI 232 CSCI 232 Computer Networking: Protocol George Blankenship Protocol George Blankenship 1
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Outline • Protocol functions rotocol layers Protocol layers • Service definitions O/OSI d l • ISO/OSI model • TCP/IP model Protocol George Blankenship 2
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Encapsulation ncapsulation • Communication message contains control and data Encapsulation Segmentation and reassembly • Control information Connection control rdered delivery – Addressing information – Error-detection information Ordered delivery Flow control Error control – Dialog control ata payload Addressing Multiplexing • Data payload – Standard format Transmission services Protocol George Blankenship 3
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Segmentation and Reassembly • Multiplexing and error control require that messages be of a Encapsulation Segmentation qg maximum length •A pplication messages must be and reassembly Connection ntrol pp g divided into segments that match the transmission criteria control Ordered delivery Flow control • Application messages that were divided must be reassembled before Error control Addressing presented to the destination application Multiplexing Transmission services Protocol George Blankenship 4
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Connection Control • The control component of a DU is overhead and detracts Encapsulation Segmentation PDU is overhead and detracts from throughput. and reassembly Connection control • The control component of a PDU can be minimized by use Ordered delivery Flow control of protocol state. protocol state machine is Error control Addressing ultiplexing • A protocol state machine is translated into a connection .
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Protocol - Slides (R1) - CSCI 232 CSCI 232 Computer...

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