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Networking Media

Networking Media. Objectives. Types of cables and connectors Constructing and terminating twisted pair cables Determining type of cable needed. Cables and Connectors. Cables and Connectors. T ypes of cables. Today Yesterday Tomorrow.

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Networking Media

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  1. Networking Media

  2. Objectives • Types of cables and connectors • Constructing and terminating twisted pair cables • Determining type of cable needed

  3. Cables and Connectors

  4. Cables and Connectors • Types of cables Today Yesterday Tomorrow

  5. Cables and Connectors UTP = Unshielded Twisted Pair • Twisted pair cables There is no shielding 4 pairs of copper wires twisted together

  6. Cables and Connectors • Twisted pair cables

  7. Cables and Connectors • Coaxial cable Center conductor Shielding • Used in TV and radio applications • Not used in computer networks any more

  8. Cables and Connectors • Optical fiber cables

  9. Cables and Connectors • Optical fiber cables

  10. Cables and Connectors • Optical fiber cables Components of the puls start at the same time. Here they arrive at different times => bad result. Here they arrive at the same time => good result.

  11. Cables and Connectors • Optical fiber cables

  12. Cables and Connectors • Optical fiber cables

  13. Construct and Terminate Twisted Pair Cables Transmit pins on one device must be connected to receive pins on the other device. • Cross-over and straight through cables Device 1 Device 2 Transmit pins Receive pins Transmit pins Receive pins There must be a crossing in the path.

  14. Construct and Terminate Twisted Pair Cables • Cross-over and straight through cables A crossing is inside each switch. Switch PC Transmit pins Receive pins Transmit pins Receive pins No need of a crossing in the path.

  15. Construct and Terminate Twisted Pair Cables • Cross-over and straight through cables A crossing is inside each switch. Switch Switch Transmit pins Receive pins Transmit pins Receive pins Another crossing must be in the path.

  16. Construct and Terminate Twisted Pair Cables Conclusion: There must be odd number of crossings in the whole path. • Cross-over and straight through cables Like devices: Crossover cable PC PC Switch Switch Unlike devices: Straight-through cable PC Switch

  17. Construct and Terminate Twisted Pair Cables • How to terminate UTP cables The plug is plugged into the jack.

  18. Construct and Terminate Twisted Pair Cables • How to terminate UTP cables Two standards on plugs and jacks

  19. Construct and Terminate Twisted Pair Cables • How to terminate UTP cables Crossover cable: A – B Straight-through cable: B – B (in Europe) Straight-through cable: A – A (in America) Remember: A for America

  20. Construct and Terminate Twisted Pair Cables • How to terminate UTP cables Jack Hold the plug as if you wanted to insert it into the jack, and arrange the color pairs to correct color sequence.

  21. Construct and Terminate Twisted Pair Cables • How to terminate UTP cables

  22. Construct and Terminate Twisted Pair Cables • Cable testing

  23. Summary • Physical cabling media must conform to standards • Cabling best practices reduce attenuation and crosstalk

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