How the Internet Works
Every time you send a message, it travels through routers, across oceans via undersea cables, and into massive data centers. Let's trace this incredible journey together.
Every time you send a message, it travels through routers, across oceans via undersea cables, and into massive data centers. Let's trace this incredible journey together.
The internet doesn't send your message all at once. It breaks it into small pieces called packets, each with its own address label, like sending a letter in multiple envelopes.
Before your packets can travel, your computer needs to find the destination's address. It asks DNS servers to translate domain names (like google.com) into IP addresses (like 142.250.80.46).
This entire DNS lookup usually takes just 20-120 milliseconds - faster than you can blink!
Your packets hop from router to router, each one deciding the best next step. Like passing a baton in a relay race, but with up to 30 handoffs!
Over 95% of international data travels through undersea fiber optic cables - not satellites! These cables, as thin as a garden hose, carry nearly all the world's internet traffic.
Your packets arrive at massive buildings filled with thousands of servers. These data centers use as much power as small cities and need elaborate cooling systems.
Major tech companies operate hundreds of data centers worldwide. Google alone has 30+ locations across 5 continents!
Packets often arrive out of order - some take longer routes! The receiving computer uses sequence numbers to put them back together, like solving a puzzle.
Click packets in the correct order (1, 2, 3...) to reassemble the message!
Even at the speed of light, distance creates delay. Select a server location to see how far your data has to travel and the resulting latency.
Light travels slower in fiber optic cables (about 2/3 the speed). Plus, each router adds processing time, and packets rarely take a straight path!
You've traced the path of internet data around the world.
Your data is split into small pieces that can take different routes and be reassembled at the destination.
Domain names are translated to IP addresses, like looking up a phone number.
Packets hop through many routers, each deciding the best next step.
95% of international data travels through fiber optic cables on the ocean floor.
Put your new knowledge into practice!