Think it through together · A little story
A robot is carrying data meant for a faraway place and comes to several exits. How does a router choose the next stop?
Lay out the process
- Read the destinationWhere does it need to go?
- Check forwarding informationWhich exit is suitable?
- Send to the next hopContinue toward the destination
A router forwards packets between networks and selects the next hop using information such as the destination address.
Like a guide at a road junction, it usually decides “which way to go for the next part,” rather than completing the entire journey itself. Several routers pass data along so it can cross different networks.
The box at home often combines routing, Wi-Fi access, switching, and other functions, so it may look like one device is doing many jobs.
Your turn to try
A phone shows full Wi-Fi bars but cannot open a faraway website. Is that a contradiction?
Have you thought it through? Open for an explanation
No. The phone may have a strong connection to the local access point while the external line, DNS, or website service has a problem.
Take away one discovery
A router forwards packets between networks and selects the next hop using information such as the destination address.
Try covering the diagram above and explaining each step to someone in your family. If one step is hard to explain, go back and look at that card again.