Packet Switching Principles Problem of circuit switching -designed for voice service -Resources dedicated to a particular call -For data transmission much of the time the connection is idle(say web browsing) -Data rate is fixed Both ends must operate at the same rate during the entire period of connection Packet switching is designed to address these problems9 Packet Switching Principles • Problem of circuit switching —designed for voice service —Resources dedicated to a particular call —For data transmission, much of the time the connection is idle (say, web browsing) —Data rate is fixed • Both ends must operate at the same rate during the entire period of connection • Packet switching is designed to address these problems