How Does BGP: Border Gateway Protocol - Computerphile Work?

BGP is like the postman who tells everyone where to send letters, but for computers on the internet.

Imagine you're playing a game of tag with your friends in different neighborhoods. Each neighborhood has its own group of kids, and they know the best way to run between houses. Now imagine each neighborhood is a network, like a city or a country on the internet. The postman, BGP, helps these networks talk to each other by telling them which path is the fastest or easiest to reach another network.

When a computer in one city wants to send data to a computer in another city, it asks BGP: “How do I get there?”

BGP looks at all the possible paths and chooses the best one, like picking the shortest path through a maze. It uses clues like how busy other networks are or if they’re having trouble.

If the postman makes a mistake, letters might go the long way around, just like data could take longer to arrive if BGP picks the wrong route. But most of the time, BGP keeps everything running smoothly, making sure your video calls and online games work without you even noticing! BGP is like the postman who tells everyone where to send letters, but for computers on the internet.

Imagine you're playing a game of tag with your friends in different neighborhoods. Each neighborhood has its own group of kids, and they know the best way to run between houses. Now imagine each neighborhood is a network, like a city or a country on the internet. The postman, BGP, helps these networks talk to each other by telling them which path is the fastest or easiest to reach another network.