Build a CDN (13 scenes)
Scene 00 · Foundations — the journey a request takes, and the words you'll hear
The whole request path on one diagram — browser → DNS → anycast → POP (the edge cache) → origin — plus a clickable glossary of the core journey terms. Orientation before you touch anything.
Scene 00
Foundations — the journey a request takes, and the words you'll hear
Diagram
Left → right, the path one request takes: **browser** (your user) → **DNS** (returns one anycast IP) → the **anycast** routing fabric (delivers you to the nearest **POP**) → the **POP** itself (an **edge** server that holds a **cache** — a **cache hit** is served here, a **cache miss** travels on) → your **origin** server. The card on the right defines whichever term you spotlight. (Two more parts of the POP — TLS termination and an optional origin shield — get their own scenes later; the map stays minimal on purpose.)
One request, the whole way down and back. First it's a MISS (origin has the only copy); then the edge has a copy and the next request is a HIT. Names come next — for now just watch the path.