1. Physical Layer
Computer Networks

2. Where are we?

3. Numbering Systems
Binary
Hexadecimal
Decimal

4. Transmission of Information
From Physics
Energy
Electromagnetic wave propogation
From Mathematics
Coding Theory

5. Analog and Digital Signaling

6. Amplitude Modulation

7. Frequency Modulation

8. Baseband and Broadband

9. Phase Modulation

10. Modems

11. Digital Encoding

12. CSU/DSU

13. Undesirable Effects and Limitations
Propagation Delay
Bandwidth
Noise
Interference
Distortion
Attenuation

14. Sampling and Nyquist’s Theorem

15. Shannon’s Limit Corrects for SNR
Encoding more bits per cycle time helps, but you cannot overcome the fundamental physical limits of a real transmission system.

16. Timing Asynchronous Synchronous Isochronous bit level character level
timing coordination must be successful

17. Transmission Media

18. Connectors

19. Media Test and Measurement
Hands-on Demo

20. Repeaters
Signal Regeneration
Clean up
Amplifly
Distance Extension

21. Hubs Repeater functionality, plus... Concentration Point
Signal Distribution Device
Management Functions

22. Throughput versus Bandwidth
Usable capacity
Determined by engineering
Electrical Property
Determined by physics