Protocols_Layered_Architecture

Protocols_Layered_Ar - Network Layered Architecture OSI Reference Model TCP/IP Protocol Suite Professor A Zahid EE450 Computer Networks A Zahid

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A. Zahid, EE450 1 Network Layered Architecture OSI Reference Model & TCP/IP Protocol Suite Professor A. Zahid EE450: Computer Networks
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A. Zahid, EE450 2 Protocols Human Protocols: • what’s the time? • I have a question • Introductions … specific msgs sent … specific actions taken when msgs received, or other events Network Protocols: • Machines rather than humans • All communication activity in Internet governed by protocols Protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt
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A. Zahid, EE450 3 Get http://www.cnn.com/politics.html Human v.s. Network Protocols Hi Hi Got the time? 2:00 TCP connection request TCP connection reply <file> time
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A. Zahid, EE450 4 Key Elements of a Protocol Syntax – Data formats, compression, encryption, etc. . – Signal levels Semantics – Error detection and control mechanisms Timing – Speed matching – Sequencing
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A. Zahid, EE450 5 Standards • Required to allow for interoperability between equipment • Advantages – Ensures a large market for equipment and software – Allows products from different vendors to communicate • Disadvantages – Freeze technology
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A. Zahid, EE450 6 OSI Reference Model
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A. Zahid, EE450 7 Data Transmission in OSI Model
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A. Zahid, EE450 8 Layer Communications • Peer layers communicate via
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This note was uploaded on 03/01/2008 for the course EE 450 taught by Professor Zahid during the Spring '06 term at USC.

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Protocols_Layered_Ar - Network Layered Architecture OSI Reference Model TCP/IP Protocol Suite Professor A Zahid EE450 Computer Networks A Zahid

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