Chapter 1 - Data Communications Basics
Chapter 7 - Data Link Layer
Chapter 2 - Basic Communication Theory
Chapter 8 - Network Control and Monitoring
Chapter 3 - Data Compression and Encryption
Chapter 9 - Transport Layer
Chapter 4 - Transmission Media
Chapter 10 - X.25 and Network Management
Chapter 5 - System Architecture
Chapter 11 - Signalling
Chapter 6 - Physical Layer
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