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 circuit establishment , data transfer and circuit termination
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