1. Outlines Received due 13 March 0%

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

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

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

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

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

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

8. 802.3 Packet Format PreSFD Destination Address Source Address LenCRCData + Padding Bytes: 7 1 6 6 2 46-1500 4

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

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

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

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

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

14. IEEE 802.1p Priority Tags 8 priorities 8 priorities MAC protocols remain unchanged MAC protocols remain unchanged Used by 802.1p enabled switches Used by 802.1p enabled switches Allows interactive voice or video to receive preferential treatment on an Ethernet LAN 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 Based on early 1980’s technology Covers OSI Layers 1 & 2 Covers OSI Layers 1 & 2 4 or 16 Mbps Line Speed 4 or 16 Mbps Line Speed Logical Ring Logical Ring Release after Reception Protocol is default Release after Reception Protocol is default Bounded MMAT = (N-1)*.010 seconds Bounded MMAT = (N-1)*.010 seconds Has Priorities Has Priorities

16. 802.5 Token Format SDACED Bytes: 1 1 1

17. 802.5 Packet Format SDAC Destination Address Source Address CRCData Bytes: 1 1 1 6 6 >0 4 1 1 FC Modified Token a.k.a Starting Frame Delimiter EDFS

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

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