BGP

Border Gateway Protocol (BGP) is a path-vector routing protocol used to exchange routing information between different autonomous systems on the internet. BGP is crucial for determining the best path for data packets to travel across the global internet and for managing internet routing policies. It uses attributes such as AS path, next-hop, and prefix length to make routing decisions and ensures that data is routed efficiently and reliably. BGP supports various features, including route aggregation, traffic engineering, and policy-based routing. Its ability to handle complex routing scenarios and scale to the internet's size makes it a fundamental protocol for global internet connectivity.