#cdn
2 articles
01
·Networking·★ MEMBER·11 min read
DNS and CDNs — What Happens Between Enter and Pixels
In the second or so between pressing Enter and seeing a page, a name gets resolved down a tree, four layers of cache get consulted, and an edge server somewhere near you answers instead of the origin. Here is how DNS walks that tree, what a TTL does not promise, and how a CDN talks its way around the speed of light — from zero background.
02
·Media in Production·FREE·10 min read
HLS and DASH — How Video Actually Reaches You
Streamed video does not flow — a player downloads small files a few seconds long, one after another. What segments and manifests really are, the arithmetic behind how a player picks a rendition, where latency comes from, how low-latency modes cheat it, and why none of it works without a CDN.