Glossary term
What is BGP (Border Gateway Protocol)?
BGP stands for Border Gateway Protocol.
How large networks tell each other which IP addresses they can reach. Example: The internet's map. Facebook's 2021 outage happened when its BGP routes disappeared.
Learn it properly · System DesignLesson 1: What Happens When You Type a URL and Press Enter?The one second between pressing Enter and seeing a page hides a DNS lookup, a trip through a dozen routers, two handshakes and a server doing real work. Every later lesson zooms into one part of that journey.