Packet Post Office — how the internet sends data
Packet Post Office is a free, hands-on computing activity that shows how the internet and computer networks send data. It runs in your browser with no login and no download.
Build a network of post offices joined by roads, then send a message that is chopped into numbered packets. Each packet finds its own route across the network and copes with storms, congestion, dropped packets and out-of-order arrival, using acknowledgements and resend so nothing is lost — a clear, playful way to teach packet switching for KS2. Please enable JavaScript to start. More free classroom apps at mousecalls.com/apps.