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Older Ethernet Standards

Older Ethernet Standards. Do Not Use Hubs or Switches Daisy-Chain Layouts 10Base5 10 Mbps, Baseband, 500 meters per segment (daisy chain) 10Base2 10 Mbps, Baseband, 185 meters per segment (daisy chain) Less expensive than 10Base5 Often called Cheapernet. Ethernet 10Base5. Mod C.

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Older Ethernet Standards

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  1. Older Ethernet Standards • Do Not Use Hubs or Switches • Daisy-Chain Layouts • 10Base5 • 10 Mbps, Baseband, 500 meters per segment (daisy chain) • 10Base2 • 10 Mbps, Baseband, 185 meters per segment (daisy chain) • Less expensive than 10Base5 • Often called Cheapernet

  2. Ethernet 10Base5 Mod C Drop Cable (Attachment Unit Interface or AUI) 15 wires NIC 15-pin AUI Connector N-Connector Trunk Cable Coaxial Cable 500 m maximum Transceiver (Medium Attachment Unit)

  3. Ethernet 10Base5 Mod C 1. Sending NIC Transmits a bit 3. Each Transceiver Sends the bit to Its NIC 2. Transceiver Broadcasts the bit

  4. Ethernet 10Base-5 • Up to 5 segments connected by repeaters • 2,500 meters maximum distance between farthest stations • Four repeaters maximum • No loops among repeaters Repeater Repeater Drop cable 500 m Maximum Segment of Trunk Cable

  5. Ethernet 10Base2 (802.3a) • Cheaper Physical Layer Standard • NICs have twist-on BNC connector • T-connector attaches to NIC • T-connector has BNC connectors for cable runs attaching it to adjacent stations To next NIC To next NIC T-connector BNC NIC

  6. Ethernet 10Base2 (802.3a) • Segments are thin coaxial cable • Run only between NICs • Daisy chain of NICs is a segment • Terminator at end of each segment • Up to 30 stations per segment • 5 segments (4 repeaters) maximum • 10Base2: 185 meters/segment Terminator NIC NIC NIC

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