How networks actually work
The real physics of latency in fibre, which workloads genuinely benefit from running at the edge, how edge functions and ETSI MEC differ, and the trade-offs vendors leave off the slide.
Transit versus settlement-free and paid peering, what exchange points like AMS-IX and TorIX actually do, why Netflix and Google put caches inside ISPs, and two real peering disputes.
Origin versus edge, anycast and PoPs, cache hit ratio and Cache-Control headers, TLS termination — and what four confirmed CDN outages reveal about depending on one.