Tuesday, 24 April 2012

Circuit Switching

  A dedicated communication path is estab nodes of the network 
This path/CAPACITY stays up for the duration of the communication 
 Example is Telephone Network



    Packet Switching  

  No capacity is dedicated alstored briefly and then transmitted to the next
Example is : Computer to Computer Communication
o ong a path through the network
o  Data Is sent out in small chunks called “Packets”
o  Each path is passed from node to node
o  At each node, entire packet is received,node.
  

Frame Relay & ATM ror Protection are removed 
o  Overhead bits for Er
o  10’s of 100’s of Mbps and also Gbps is possible  



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