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Published byBeatrice Wood Modified over 9 years ago
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1 LAN Wiring, Physical Topology, and Interface Hardware
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2 Network Interface Hardware
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3 Ethernet Wiring Three schemes –Correspond to three generations –All use same frame format
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4 Original Thick Ethernet Wiring Used heavy coaxial cable Formal name 10Base5 Called thicknet
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5 Connection Multiplexing Concept –Multiple stations share one network connection Motivation –Cost –Convenience of wiring Hardware device required
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6 Illustration Of Connection Multiplexing Multiplexing device attached to network Stations attach to device Predates hubs
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7 Second Generation Ethernet Wiring Used thinner coaxial cable Formal name 10Base2 Called thinnet
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8 Modern Ethernet Wiring Uses a hub Formal name 10Base-T, 100Base-T, 1000Base-T Called twisted pair Ethernet
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9 Twisted Pair Ethernet
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10 Different NIC Connector
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11 Ethernet Wiring In An Office
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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
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13 Categories of Wire
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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
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