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,

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Presentation transcript:

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 NIC 15-pin AUI Connector Drop Cable (Attachment Unit Interface or AUI) 15 wires Trunk Cable Coaxial Cable 500 m maximum N-Connector Transceiver (Medium Attachment Unit)

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

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 Drop cable Segment of Trunk Cable 500 m Maximum

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 NIC BNC T-connector To next NIC To next NIC

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 NIC Terminator