Switching_Technologies

Switching_Technologies - Switching Technologies EE450:...

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A.Zahid-EE450 1 EE450: Introduction to Computer Networks Professor A. Zahid Switching Technologies
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A.Zahid-EE450 2 Switched Network • Long distance transmission is typically done over a network of switched nodes • Nodes not concerned with content of data • End devices are stations – Computer, terminal, phone, etc. • A collection of nodes and connections is a communications network • Data routed by being switched from node to node
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A.Zahid-EE450 3 A Switched Network
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A.Zahid-EE450 4 Switching Nodes • Nodes may connect to other nodes only, or to stations and other nodes • Node to node links usually multiplexed • Network is usually partially connected – Some redundant connections are desirable for reliability • Two different switching technologies – Circuit switching – Packet switching
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A.Zahid-EE450 5 Circuit Switching Technology • A Circuit is a dedicated (for the duration of the call) communication path between two stations. • Circuit switching requires three phases namely
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Switching_Technologies - Switching Technologies EE450:...

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