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Explore the fundamentals of computer networking, from numbering systems to transmission of information, including analog and digital signaling. Learn about modulation techniques, transmission media, and overcoming undesirable effects in real transmission systems.
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Physical Layer Computer Networks John Kristoff
Numbering Systems • Binary • Hexadecimal • Decimal John Kristoff
Transmission of Information • From Physics • Energy • Electromagnetic wave propogation • From Mathematics • Coding Theory John Kristoff
Analog and Digital Signaling John Kristoff
Amplitude Modulation John Kristoff
Frequency Modulation John Kristoff
Baseband and Broadband John Kristoff
Phase Modulation John Kristoff
Modems John Kristoff
Digital Encoding John Kristoff
CSU/DSU John Kristoff
Undesirable Effects and Limitations • Propagation Delay • Bandwidth • Noise • Interference • Distortion • Attenuation John Kristoff
Sampling and Nyquist’s Theorem John Kristoff
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. John Kristoff
Timing • Asynchronous • bit level • Synchronous • character level • Isochronous • timing coordination must be successful John Kristoff
Transmission Media John Kristoff
Connectors John Kristoff
Media Test and Measurement • Hands-on Demo John Kristoff
Repeaters • Signal Regeneration • Clean up • Amplifly • Distance Extension John Kristoff
Hubs • Repeater functionality, plus... • Concentration Point • Signal Distribution Device • Management Functions John Kristoff
Usable capacity Determined by engineering Electrical Property Determined by physics Throughput versus Bandwidth John Kristoff