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Network Communications Chapter 10

Network Communications Chapter 10. Fast Ethernet (100Mb/s) Networking Technology. MII. Fast Ethernet Protocol Stack. Figure 10.1. Pair 3 data. PMD. Pair 4 data. One wire from pair 2. CSMA/CD. CSMA/CD. One wire from pair 1. 100BaseT4. 100 – Speed Base – baseband T – twisted pair

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Network Communications Chapter 10

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  1. Network CommunicationsChapter 10 Fast Ethernet (100Mb/s) Networking Technology

  2. MII Fast Ethernet Protocol Stack Figure 10.1

  3. Pair 3 data PMD Pair 4 data One wire from pair 2 CSMA/CD CSMA/CD One wire from pair 1 100BaseT4 • 100 – Speed • Base – baseband • T – twisted pair • 4 – pairs Figure 10.2

  4. 100BaseTX • X - 2 pair (or 1- rare) • UDP CAT5 • MLT-3 • 4B/5B Figure 10.3: example MLT-3 Signal(0 0 0 0 1 1 1 0)  (1 1 1 1 0 1 1 1 0 0)

  5. 100BaseFX • F - Fiber • Separate send & receive fibers Figure 10.4: Repeater (Hub) Connection

  6. Repeater (or Hub) • Class 1 • Larger internal delay • One per Fast Ethernet Segment • Interfaces 100BaseFX  100BaseTX • Class 2 • Two allowed per segment • All nodes of the same type

  7. Network Diameter • Maximum distance (UDP) between repeaters – 5 meters • No cable exceeds 100 meters (check Hub specifications) • Maximum distance between switches – 2000 meters (using fiber)

  8. Expanding Network Diameter:Using An Ethernet Switch Figure 10.9

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