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Outlines Received due 13 March

Outlines Received due 13 March. 0%. Homework. Review your notes. Prepare for Midterm! Work on outline Readings [3] “Trunking Branches Out” [4] “Gigabit Ethernet: From 100 to 1,000 Mbps”. Remarks about the Paper. Probe Further Term Paper NOT EQUAL to Book Report

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Outlines Received due 13 March

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  1. OutlinesReceiveddue 13 March 0%

  2. Homework... • Review your notes. Prepare for Midterm! • Work on outline • Readings[3] “Trunking Branches Out”[4] “Gigabit Ethernet: From 100 to 1,000 Mbps”

  3. Remarks about the Paper • Probe Further • Term Paper NOT EQUAL to Book Report • Watch Out for Plagiarism“Word for Word quotes should be clearly marked and cited” said Dr. Scheets • Typical Format • Introduction • Main BodyCurrent Status • Conclusion • References

  4. Documentation (20 points) • No Need to cite ‘Common Knowledge’ • Class Notes • Class Readings • Information not ‘Common Knowledge’ should be cited in main body of paper • # of References?Convince reader you’ve left no stone unturned

  5. Attention to Detail (25 points) • Grammatikal erors • Inconsistant indentation • Inkonsistent punctuation • general sloppiness

  6. Contents (80 points) • Contents of Outline addressed? • Smooth Logic Flow? • Unclear sentence? • Erroneous Statement • Failure to probe further

  7. To Maximize Your Score • Follow Outline • Good Read • Factually Correct • See web for full details!

  8. Destination Address Source Address Pre SFD Len Data + Padding CRC 802.3 Packet Format Bytes: 7 1 6 6 2 46-1500 4

  9. Transmitting a File • Broken into smaller packets • Initial packets from Layer 5 Open Logical Connection • Packets from Layer 7 “Data” Contains Layer 7 traffic “Data” Contains Layer 3-5 info • Packets from Layer 4 Acknowledgements • Final packets from Layer 5 Close Logical Connection

  10. IEEE 802.3u 100 Mbps Fast Ethernet • Preserves CSMA/CD • Preserves Packet Format • Maximum End-to-End Lengths (a.k.a. Collision Domain) reduced to keep Normalized Propagation Delay low • Sales are pretty good

  11. RIP IEEE 802.12 100VG-AnyLAN • Standard backed by HP & others • Ditches CSMA/CD • Uses ‘Demand Priority’ MAC protocol • Has priorities • Preserves Packet Format • Can interface with Ethernet or Token Ring • Abysmal Sales

  12. IEEE 802.3z 1 Gbps Ethernet • Uses an extended version of CSMA/CD, including ‘Frame Bursting’ • Best performance uses full duplex connections & switched hubs • Collision Domain same as Fast Ethernet • Preserves Packet Format • Good Sales

  13. IEEE 802.3? 10 Gbps Ethernet • Standard due around 2001 • Will not use CSMA/CD • Will use switched hubs & full duplex connections

  14. IEEE 802.1p Priority Tags • 8 priorities • MAC protocols remain unchanged • Used by 802.1p enabled switches • Allows interactive voice or video to receive preferential treatment on an Ethernet LAN

  15. IEEE 802.5 Token Ring • Based on early 1980’s technology • Covers OSI Layers 1 & 2 • 4 or 16 Mbps Line Speed • Logical Ring • Release after Reception Protocol is default • Bounded MMAT = (N-1)*.010 seconds • Has Priorities

  16. Bytes: 1 1 1 SD AC ED 802.5 Token Format

  17. 802.5 Packet Format Bytes: 1 1 1 6 6 Destination Address Source Address SD AC FC Modified Tokena.k.a Starting Frame Delimiter >0 4 1 1 Data CRC ED FS

  18. IEEE 802.5 Token Ring • 2nd most widely used LAN protocol • Similar evolution to Ethernet • Logical & Physical Ring • Logical Ring, Shared Physical Star • Logical Ring, Switched Physical Star • 100 Mbps products available since ‘98

  19. LAN Throughput • average bit transmission rate actually available for use • Throughput = Efficiency * Line Speed • No Load Ethernet Efficiency approximately equals 100% • Heavy Load Ethernet Efficiency approximately equals 1/(1+5*NPD) These are Estimates.

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