Java Notes - How Information is Transmitted in a Network 1...

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How Information is Transmitted in a Network 1. Information is transformed into electrical or optical signals 2. All signals are corrupted during transmission 3. Transmission adds noise to the signal 4. Digital data helps over come noise 5. Slightly corrupted 1's are distinguishable from slightly corrupted 0's and Digital data allows for error-control 6. Dynamic data like audio or video normally requires continuous transmission Switching Circuit switching- A direct line between to users is established The users "own" the line until they drop the connection Virtual circuit switching- All packets of a stream follow the same route, Used by ATM (Asynchronous Transfer Mode ) Datagram packet switching- Each packet is routed individually All packets of a stream may or may not take the same route
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Unformatted text preview: Used by TCP/IP Multiplexing- How to share a communication channel Frequency - Division Multiplexing ( FDM ) Synchronous communications- Bit stream is delivered with a fixed delay and given error rate. Each bit reaches the destination with the same time delay after leaving the source Asynchronous communications- Bit stream is divided into packets Packets are received with varying delays, so packets can arrive out of order, Some packets are not received correctly Connection-oriented Packets are delivered in order, System confirms delivery and put packets in order, No errors Connectionless Packets are treated individually, Expedited Data, Fast Delivery...
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  • Spring '12
  • PaigeS.Rutner
  • Asynchronous Transfer Mode, virtual circuit, communications- Bit stream

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