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Click to edit Master subtitle style

Click to edit Master subtitle style. Chapter 3: Networking Topologies, Connectors and Wiring Standards Instructor:. Chapter 3: Objectives. 3.1 Categorize standard media types &associated properties. Fiber : Multimode Singlemode Copper : Media converters : Singlemode fiber to Ethernet

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  1. Click to edit Master subtitle style Chapter 3: Networking Topologies, Connectors and Wiring Standards Instructor:

  2. Chapter 3: Objectives 3.1 Categorize standard media types &associated properties. Fiber: • Multimode • Singlemode Copper: • Media converters: • Singlemode fiber to Ethernet • Multimode fiber to Ethernet • Fiber to Coaxial • Singlemode to multimode fiber • Distanceand speedlimitations (**** • Broadband over powerline (BOP) 3.2 Categorize standard connector types based on network media. (How you connect the media to other things) • Fiber: • ST • SC • LC • MTRJ 3.8 Identify components of wiring distribution. • IDF • MDF • Demarc • Demarc extension • Smart jack • CSU/DSU • Copper: • RJ-45 • RJ-11 • BNC • F-connector • DB-9 (RS-232) • Patch panel • 110 block (T568A, T568B) UTP STP CAT3 CAT5 CAT5e CAT6 CAT6a Coaxial Crossover T1 Crossover Straight-through 2

  3. Physical Media Let’s take a look at the three types of popular cables used in modern networking designs: • Coaxial • Twisted pair • Fiber optic 3

  4. Coax • Coaxial cable, referred to as coax, contains a center conductor made of copper that’s surrounded by a plastic jacket with a braided shield over it. • A plastic such as polyvinyl chloride (PVC, commonly known as Teflon) covers this metal shield. • The Teflon-type covering is frequently referred to as a plenum-rated coating, and it’s often mandated by local or municipal fire code when cable is hidden in walls and ceilings. 4

  5. Thinnet Coax 5

  6. BNC Connectors 6

  7. Twisted-Pair Cable • Twisted-pair cable consists of multiple individually insulated wires that are twisted together in pairs. • Sometimes a metallic shield is placed around them; hence the name shielded twisted-pair (STP). • Cable without outer shielding is called unshielded twisted-pair (UTP), and it’s used in twisted-pair Ethernet (10Base-T, 100Base-TX, 1000Base-TX) networks. • So why are the wires in this cable type twisted? Because when electromagnetic signals are conducted on copper wires in close proximity—like inside a cable—it causes interference called crosstalk. Twisting two wires together as a pair minimizes interference and even protects against interference from outside sources. 7

  8. Unshielded Twisted-pair This cable type is the most common today for the following reasons: • It’s cheaper than other types of cabling. • It’s easy to work with. • It allows transmission rates that were impossible 10 years ago. • UTP cable is rated in these categories: • Cat1 • Cat2 • Cat3 • Cat4 • Cat5 • Cat5e • cat6 8

  9. Cat 5e UTP Cable 9

  10. RJ Connectors 10

  11. Fiber Optic • Because fiber-optic cable transmits digital signals using light impulses rather than electricity, it’s immune to EMI and RFI. • The cable itself comes in either single-mode fiber (SMF) or multimode fiber (MMF); the difference between them is in the number of light rays (the number of signals) they can carry. Multimode fiber is most often used for shorter-distance applications and single-mode fiber for spanning longer distances. 11

  12. Fiber Optic Although fiber-optic cable may sound like the solution to many problems, it has pros and cons just like the other cable types. Here are the pros: • Is completely immune to EMI and RFI • Can transmit up to 40 kilometers (about 25 miles) And here are the cons: • Is difficult to install • Is more expensive then twisted-pair • Troubleshooting equipment is more expensive then twisted-pair test equipment • Is harder to troubleshoot 12

  13. ST Connector Examples 13

  14. SC Connector Examples 14

  15. MT-RJ and LC Fiber Connectors 15

  16. Media Converters

  17. Media Converters (Cont.)

  18. Broadband over Power Line

  19. Serial Cables

  20. Universal Serial Bus

  21. Cable Properties • Transmission Speeds • Distance • Duplex • Noise Immunity (Security, EMI) • Frequency

  22. Wiring Standards There are different types of Ethernet wiring standards available: • Straight-through cable (586A) • Crossover cable (586B) • Rolled cable (rollover) • Hardware loopback 22

  23. 568A vs. 568B 568A+568A = straight through 568B+568B = straight through 568A+568B = crossover 23

  24. Straight-through Ethernet Cable 24

  25. Crossover Cable 25

  26. Rollover/Rolled Cable 26

  27. T1 Crossover Cable 27

  28. Installing Wiring Distributions • MDF/IDF • 25 Pair • 110 Block • Demarc/Demarc Extension • Smart Jack 28

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