1. 1 LAN Wiring, Physical Topology, and Interface Hardware

2. 2 Network Interface Hardware

3. 3 Ethernet Wiring Three schemes –Correspond to three generations –All use same frame format

4. 4 Original Thick Ethernet Wiring Used heavy coaxial cable Formal name 10Base5 Called thicknet

5. 5 Connection Multiplexing Concept –Multiple stations share one network connection Motivation –Cost –Convenience of wiring Hardware device required

6. 6 Illustration Of Connection Multiplexing Multiplexing device attached to network Stations attach to device Predates hubs

7. 7 Second Generation Ethernet Wiring Used thinner coaxial cable Formal name 10Base2 Called thinnet

8. 8 Modern Ethernet Wiring Uses a hub Formal name 10Base-T, 100Base-T, 1000Base-T Called twisted pair Ethernet

9. 9 Twisted Pair Ethernet

10. 10 Different NIC Connector

11. 11 Ethernet Wiring In An Office

12. 12 A Note About Ethernet Topology Apparently –Original Ethernet used bus topology –Modern Ethernet uses star topology In fact, modern Ethernet is –Physical star –Logical bus –Called star-shaped bus

13. 13 Categories of Wire

14. 14 Higher Speed Ethernets Fast Ethernet –Operates at 100 Mbps –Formally 100Base-T –Two wiring standards –10/100 Ethernet devices available Gigabit Ethernet –Operates at 1000 Mbps (1 Gbps) –Slightly more expensive