Compuiter network 3 physical

Physical Layer Computer Networks Where are we? Numbering Systems Binary Hexadecimal Decimal Transmission of Information From Physics Energy Electromagnetic wave propogation From Mathematics Coding Theory Analog and Digital Signaling Amplitude Modulation Frequency Modulation Baseband and Broadband Phase Modulation Modems 10 Digital Encoding 11 CSU/DSU 12 Undesirable Effects and Limitations Propagation Delay Bandwidth Noise Interference Distortion Attenuation 13 Sampling and Nyquist’s Theorem 14 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 15 Timing Asynchronous bit level Synchronous character level Isochronous timing coordination must be successful 16 Transmission Media 17 Connectors 18 Media Test and Measurement Hands-on Demo 19 Repeaters Signal Regeneration Clean up Amplifly Distance Extension 20 Hubs Repeater functionality, plus Concentration Point Signal Distribution Device Management Functions 21 Throughput versus Bandwidth Usable capacity Determined by engineering Electrical Property Determined by physics 22 ... Distortion Attenuation 13 Sampling and Nyquist’s Theorem 14 Shannon’s Limit Corrects for SNR Encoding more bits per cycle time helps, but you cannot overcome the fundamental physical limits of a