This week we made a full loop around AWS's "internal infrastructure": servers (compute), the vessels that hold data (storage), the roads that connect them (networking), and the outward-facing services that deliver to faraway users fast (edge). Today we won't add anything new — we'll tie the scattered pieces into a single big picture for review.
The heart of review isn't memorization but "when to pick what." The exam almost always gives you a situation (a scenario) and asks "which service is the best fit?" So today we organize around per-service comparison tables and selection criteria.