Protocol (R1)

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

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Unformatted text preview: CSCI 232 - Computer Networks Protocol George Blankenship 1 Protocol George Blankenship 1 CSCI 232 Computer Networking: Protocol George Blankenship Protocol George Blankenship 2 Outline • Protocol functions • Protocol layers • Service definitions • ISO/OSI model • TCP/IP model Protocol George Blankenship 3 Encapsulation • Communication message contains control and data • Control information – Addressing information – Error-detection information – Dialog control • Data payload – Standard format 9 Encapsulation ¾ Segmentation and reassembly ¾ Connection control ¾ Ordered delivery ¾ Flow control ¾ Error control ¾ Addressing ¾ Multiplexing ¾ Transmission services CSCI 232 - Computer Networks Protocol George Blankenship 2 Protocol George Blankenship 4 Segmentation and Reassembly • Multiplexing and error control require that messages be of a maximum length • Application messages must be divided into segments that match the transmission criteria • Application messages that were divided must be reassembled before presented to the destination application 9 Encapsulation 9 Segmentation and reassembly ¾ Connection control ¾ Ordered delivery ¾ Flow control ¾ Error control ¾ Addressing ¾ Multiplexing ¾ Transmission services Protocol George Blankenship 5 Connection Control • The control component of a PDU is overhead and detracts from throughput. • The control component of a PDU can be minimized by use of protocol state. • A protocol state machine is translated into a connection . 9 Encapsulation 9 Segmentation and reassembly 9 Connection control ¾ Ordered delivery ¾ Flow control ¾ Error control ¾ Addressing ¾ Multiplexing ¾ Transmission services Protocol George Blankenship 6 Ordered Delivery...
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This note was uploaded on 09/03/2010 for the course CS 232 taught by Professor Susan during the Summer '09 term at GWU.

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

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