BGP, or Border Gateway Protocol, is the routing protocol used to exchange routing information between different autonomous systems (AS) on the internet. Here’s how BGP internet connectivity works: BGP routers, known as BGP peers or neighbors, establish TCP connections to exchange routing information. Each BGP router advertises routes to networks it can reach, along with associated attributes such as route preference and path information. BGP uses policies and attributes to select the best paths to destination networks, considering factors like route origin, AS path length, and next-hop address. This process enables BGP routers to dynamically update their routing tables and propagate reachability information across the internet, ensuring efficient and reliable data transmission between autonomous systems.