Follow one packet
A network moves small units of data through connected devices. Different devices solve different parts of the journey.
In 30 seconds
- A switch usually connects devices within a local network.
- A router forwards packets between networks.
- Wi-Fi is one way to join a network; it is not the Internet itself.
Make it concrete
Your phone may reach a local printer while the Internet link is down. Draw which parts of those two paths are shared.
- 01Device
- 02Switch
- 03Router
Check your understanding
Can a local network function without Internet access?
- A switch usually connects devices within a local network.
- A router forwards packets between networks.
- Wi-Fi is one way to join a network; it is not the Internet itself.
Go to the source
Sources reviewed: 13.09.2026