Chabot College ELEC 99.05 Network Devices.

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Presentation transcript:

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. Function: to strengthen signal & extend it to a new media segment. Layer 1 device - works with bits. Animation

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

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

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.

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

Net Devices Solve Problems

Devices Function at Layers

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

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

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

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

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