1. DATA COMMUNICATION
Lecture-3

2. Recap of Lecture 2 Key Data Communication Terminology
Networks and Why we need Them?
Distributed Processing
Network Criteria
Network Applications

3. Overview of Lecture 3 Communication Tasks Protocols
Protocol Architecture
Characteristics of a Protocol

4. Communications Tasks Transmission System utilization Interfacing
Signal Generation
Synchronization
Exchange Management
Error Detection and Correction
Flow Control
Addressing
Routing
Recovery
Security
Network Management

5. “Set of Rules Governing Communication”
Protocols
“Set of Rules Governing Communication”

6. Protocols Protocols defines: What is Communicated?
How, it is Communicated?
When, it is Communicated?

7. Protocols
Elements of a Protocol:
Syntax
Semantics
Timing

8. Protocol Architecture
“Instead of having a single Module for performing communication, there is a structured set of modules that implement communications function”

9. Simplified File Transfer Architecture

10. Characteristics of a Protocol
Direct or indirect
Monolithic or structured
Symmetric or asymmetric
Standard or nonstandard

11. Summary Communication Tasks Protocols Protocol Architecture
Characteristics of a Protocol

12. Suggested Reading
Section 1.4 “Data Communications and Networking” 2nd Edition by Behrouz A. Forouzan
Sections 1.1,2.1 “Data and Computer Communication” 6th Edition by William Stallings