Transcript CENG 3331 Introduction to Telecommunications and Networks

Ch. 2 Protocol Architecture
2.1 The Need for a Protocol Architecture
• Same set of layered functions need to exist
in the two communicating systems.
• Key Features of a Protocol
– Syntax--Concerns the format of the data
blocks.
– Semantics--Includes control information for
coordination and error handling.
– Timing--Includes speed matching and
sequencing.
2.2 A Simple Protocol Architecture
• Three-Layer Model (Fig. 2.1--2.2)
– Application (eg., File Transfer)
– Transport (Communications Service Module)
– Network Access
2.3 The TCP/IP Protocol
Architecture
• The TCP/IP Protocol Architecture (Fig. 2.3)
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Application
Transport (Host-to-Host)
Internet
Network Access
Physical
2.3 (cont.)
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Fig. 2.4 TSCP/IP Concepts
Fig. 2.5 Protocol Data Units for TCP/IP
Fig. 2.6 TCP and UDP Headers
Fig. 2.7 IP Headers
Fig. 2.8 TCP/IP Protocol Suite