BGP
BGP (Border Gateway Protocol) is a standardized exterior gateway protocol designed to exchange routing and reachability information between autonomous systems (AS) on the Internet. It is the core routing protocol that enables data to flow across different networks by determining the best paths for data packets based on policies, network performance, and rules. BGP is essential for the global Internet's infrastructure, as it connects ISPs, large enterprises, and data centers.
Developers should learn BGP when working in network engineering, cloud infrastructure, or cybersecurity roles that involve managing large-scale networks or Internet connectivity. It is crucial for configuring and troubleshooting routing between autonomous systems, optimizing network performance, and ensuring redundancy and failover in distributed systems. Specific use cases include multi-homed Internet connections, cloud peering, and implementing traffic engineering policies.