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Chabot College

Chabot College. ELEC 99.05 Network Devices. Network Devices. Every type of network device was developed to solve a problem . Network devices operate at different layers of the OSI model. Are represented by Cisco icons. Repeater. Problem: On a long wire, signal gets weak.

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Chabot College

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  1. Chabot College ELEC 99.05 Network Devices

  2. Network Devices • Every type of network device was developed to solve a problem. • Network devices operate at different layers of the OSI model. • Are represented by Cisco icons.

  3. Repeater • Problem: On a long wire, signal gets weak. • Function: to strengthen signal & extend it to a new media segment. • Layer 1 device - works with bits. • Animation

  4. Hub • Problem: workgroups need shared access to printers, files, etc. • Function: to provide concentrated connections for workgroups. • Hub is a multi-port repeater. • Layer 1 device - works with bits. • Animation

  5. Bridge • Problem: too much traffic jams network. • Function: to segment traffic and contain traffic jams. • Layer 2 device - works with MAC addresses.

  6. Switch • Problem: shared access often results in traffic jams. • Function: to concentrate connections & segment traffic. • Combines advantages of hub & bridge. • Switch is a multi-port bridge. • Layer 2 device - works with MAC addresses.

  7. Router • Problem: How to find network path from Hayward to New York. • Function: to direct traffic over multiple paths. • Also: • to contain traffic jams • to connect different network topologies • Layer 3 device - works with IP addresses. • Animation

  8. Net Devices Solve Problems

  9. Devices Function at Layers

  10. Quiz • What’s this? • Repeater • Which OSI Layer? • Layer 1 • Works with? • Bits - 10010101

  11. Quiz • What’s this? • Hub • Which OSI Layer? • Layer 1 • Works with? • Bits - 10010101

  12. Quiz • What’s this? • Bridge • Which OSI Layer? • Layer 2 • Works with? • MAC Addresses - 00-C0-F0-56-BD-71

  13. Quiz • What’s this? • Switch • Which OSI Layer? • Layer 2 • Works with? • MAC Addresses - 00-C0-F0-56-BD-71

  14. Quiz • What’s this? • Router • Which OSI Layer? • Layer 3 • Works with? • IP Addresses - 172.28.118.240

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