This section goes past the basics for architects, SREs and senior platform engineers who already run traffic through a CDN and want to understand what drives performance and cost at scale. Topics include anycast and DNS-based routing, BGP and internet backbone design, origin shielding and tiered caching, multi-CDN switching, edge functions and serverless code, and techniques for cutting latency in live and on-demand video.
Expect architecture diagrams, trade-offs and decision frameworks rather than definitions. The articles assume you know how caching works and want to answer harder questions: when a second CDN pays off, how to keep origin load flat during a traffic spike, and where compute at the edge makes sense. For the network layer itself, continue in networking and ISP.
