BGP for Application Engineers: How the Internet Routes (and How It Breaks)

When Cloudflare leaks routes, half the internet goes down. When AWS misconfigures a peering, latency triples for entire regions. When YouTube briefly pointed to Pakistan, the world noticed for hours. BGP is the protocol that decides how packets get from your laptop to a server in Singapore -- and most of it is held together by trust between network operators. Knowing the basics turns global outages from incomprehensible to merely scary.