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Chapter 5

Modern Ethernet. Chapter 5. Modern Ethernet. > 10 Mbps Examples: Fast Ethernet : 100 Mbps Gigabit Ethernet: 1000 Mbps 10 Gigabit Ethernet: 10,000 Mbps. Fast Ethernet. 100 Mbps Also known as 100Base Ethernet Includes: 100BaseTX 100BaseT4 (disappeared) 100BaseFX.

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Chapter 5

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  1. Modern Ethernet Chapter 5

  2. Modern Ethernet > 10 Mbps Examples: Fast Ethernet: 100 Mbps Gigabit Ethernet: 1000 Mbps 10 Gigabit Ethernet: 10,000 Mbps

  3. Fast Ethernet 100 Mbps Also known as 100Base Ethernet Includes: 100BaseTX 100BaseT4 (disappeared) 100BaseFX

  4. 100BaseTX versus 100BaseT4 versus 100BaseFX Similarities: Star-Bus technology CSMA/CD Ethernet frame 100 Mbps Baseband Differences: 100BaseTX uses UTP cable, two pairs, CAT5 or higher, maximum length of cable from a node to a hub: 100 meters 100BaseT4 uses UTP cable, four pairs, CAT3 or higher, maximum length of cable from a node to a hub: 100 meters 100BaseFX uses multimodefiber optic cable, maximum length of cable from a node to a hub: 2000 meters, no EMI, no wire tap (more secured)

  5. Gigabit Ethernet 1000BaseX 1000Mbps (1 Gbps)‏ 1000BaseT: Four pairs of CAT5 or better UTP cable Maximum length of cable from a node to a hub: 100 meters

  6. Gigabit Ethernet 1000BaseSX: Multimode fiber optic cables Maximum length of cable from a node to a hub: 220-500 meters 1000BaseLX: Singlemodefiber optic cables Maximum length of cable from a node to a hub: 5000 meters S = short reach L = long reach

  7. 10Gigabit Ethernet 10GBaseSR/SW Multimode fiber optic cable 26-300 meters 10GBaseLR/LW Singlemodefiber optic cable 10,000 meters 10GBaseER/EW Singlemodefiber optic cable 40,000 meters E = extended reach

  8. 10Gigabit Ethernet 10GBaseT Four pair, CAT 6/6a UTP cable CAT 6 = 55 meters max. CAT 6a = 100 meters max. R: LAN W: designed to interoperate with SONET equipment using a light-weight SDH/SONET frame

  9. 10/100BaseT Devices 10/100BaseT Devices: Networking devices (e.g., NIC, hub, UTP cable) that can work in BOTH 10BaseT and 100BaseT networks What are 10/100/1000BaseT Devices? What is 10/100/1000BaseT Switch? What is 10/100/1000BaseT NIC?

  10. Multispeed Switch To break a network into multiple segments that have different data transmission speed (throughputs)‏ High-traffic segment (e.g., backbone) has high data transmission speed technology, low-traffic segment has low data transmission speed technology, in order not to waste resources (max performance & min cost) Backbone A segment that connects other segments‏ (a switch that connects other switches)

  11. Multispeed Switch 10Base (10 Mbps) segment 100Base (100 Mbps)‏ segment

  12. Multispeed Switch What speed do you want to use in this path? What speed do you want to use in this path? 5th Floor Server 3rd Floor Server

  13. Full-Duplex Ethernet Normally, Ethernet works in HALF-DUPLEX mode: One frame can travel over the network at any time Ethernet switch and Ethernet NICs that can run in Full-Duplex mode enable Ethernet network to run in a FULL-DUPLEX mode At any time, multiple computers can send frames to the network (in other words, multiple frames can travel over the network at any time)‏ By running in a Full-Duplex mode, the network operates more efficiently by minimizing the waiting time and removing the possibility of collision By running in a Full Duplex mode, the data transmission rate can be twice as fastas the one in a Half Duplex mode

  14. Switch (Bridge) to Enable Full Duplex Mode Collision Domain 1 Collision Domain 2 No Collision Frame For Computer 1 Frame For Computer 2 Computer 1 Computer 2 Bridge

  15. Full-Duplex Switch • 10/100BaseT switch: • http://www.superwarehouse.com/Linksys_Etherfast_10_100_8_Port_Auto-Sensing_Switch/EZXS88W/ps/117963 • Check the “Features” of this switch. One of them indicates that this switch can run at 10, 20, 100, 200 Mbps. Explain how this 10/100BaseT switch can run at 20 and 200 Mbps

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