How Does BGP Overview Work?

BGP is like a group of friendly messengers that help different neighborhoods talk to each other so everyone can find the best way to send letters.

Imagine you live in a big city with lots of little neighborhoods, and each neighborhood has its own post office. When someone wants to send a letter from one neighborhood to another, they need a messenger who knows the fastest route. That messenger is like BGP, it helps pick the best path for the letter to travel.

Each post office (like a router) has its own list of messengers (called routes) that know how to get letters to other neighborhoods. When a new messenger arrives with better news about a faster route, the post office updates its list so future letters can take the best path.

Sometimes, one neighborhood might have multiple messengers going through different streets, BGP helps decide which one is the fastest or most reliable.

If one street gets blocked (like a network failure), BGP sends another messenger to find a new route. This way, letters keep flowing smoothly without anyone noticing the trouble. It's like having backup plans for your bike ride, if your usual path is closed, you just take a different one!