Technology
How does packet switching work?
Packet switching is how the internet moves data. Instead of sending a message all at once, it's broken into small 'packets' that travel independently across the network — possibly by different routes — and are reassembled in order at the destination.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how packet switching works.
Step by step
- 1Data is split into small packets.
- 2Each packet can take its own route across the network.
- 3Packets are reassembled in order at the destination.
- 4It makes networks efficient and resilient.
Frequently asked questions
- How does packet switching work?
- Data is broken into packets that travel independently and are reassembled at the destination.
- Why is packet switching efficient?
- Packets share network paths flexibly and can reroute around congestion or failures.
- What happens if a packet is lost?
- Protocols like TCP detect missing packets and request them again, ensuring complete delivery.