Chapter 9 Communications Circuits 9 PACKET SWITCHING When packet switching technology is used messages are broken down into fixed length pieces called packets, which are sent through a network individually. The process of segmenting messages into packets is called packetizing. www.gxmu.edu.cn9.7 PACKET SWITCHING When packet switching technology is used, messages are broken down into fixed length pieces called packets, which are sent through a network individually. The process of segmenting messages into packets is called packetizing. www.gxmu.edu.cn Chapter 9 Communications Circuits