A 2.3.3 Packet Switching
A network rarely sends a message as one piece. It breaks the message into small parts called packets, sends each one separately, and rebuilds the message at the far end. This is packet switching, and it is how data crosses almost every modern network, including the internet. What is in a packet, and why is each part needed? Why can the packets of one message take different routes? How does the destination rebuild the...