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Repeaters, Hubs, Bridges, Switches, Routers & Gateways

Repeaters, Hubs, Bridges, Switches, Routers & Gateways. Created by: David Elwell Dorian Glassberg Alley Hennigan. Repeaters and Hubs. Classified as “unintelligent” devices. Two of the simplest networking devices. Repeaters. Inexpensive. Best used in a bus topology.

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Repeaters, Hubs, Bridges, Switches, Routers & Gateways

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  1. Repeaters, Hubs, Bridges, Switches, Routers & Gateways Created by: David Elwell Dorian Glassberg Alley Hennigan

  2. Repeatersand Hubs • Classified as “unintelligent” devices. • Two of the simplest networking devices.

  3. Repeaters • Inexpensive. • Best used in a bus topology. • Being phased out in modern networks.

  4. Hubs • A repeater with more than one output port. • Have an uplink port, that allows the hub to connect to another hub or another connectivity device.

  5. Hubs Hubs do not separate collision domains

  6. Bridges and Switches • Operate at OSI layer 2* • “Intelligent” devices

  7. Bridges • Divides a network into 2 • No valid address, no data across the bridge

  8. Bridges

  9. Switches Same as Bridges, but usually have multiple ports

  10. Switches • Isolate data flow • Improve performance

  11. Multilayer Switch • Layer 3 (Network) Switching • Router = Microprocessor • Multilayer Switch = Circuit Hardware

  12. Bridges and Switches

  13. Routers and Gateways Key devices for communication between networks

  14. Gateways • “Protocol converters” • A network node used to interface between different networks • Acts as an entrance to another network • Routers are a special type of gateway

  15. Routers • Forwards data packets across computer networks • Works almost exclusively at the third layer • History: • Idea: 1972 by INWG • First model: 1981 through DARPA initiative • Tiers: • Access • Distribution • Security • Core

  16. Routers • A • B • C Router

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