Follow the request/data flow through the architecture.
Work through each concept and mark it understood. This unlocks the knowledge check.
A global CDN that caches content at edge locations near users.
Why it matters
Cuts latency, offloads origins, and reduces egress cost.
When to use it
Use in front of S3 static sites and APIs for global audiences.
Gotcha (exam trap)
Cache invalidations cost money and take time — version your asset filenames instead of invalidating constantly.
Finish the walkthrough above to unlock the check.
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