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Which combination minimises egress cost when streaming static video to global users?
AAmazon CloudFront in front of an S3 origin — edge caches absorb most traffic, and CloudFront egress pricing tiers are cheaper at scale
BDirect-from-S3 serving with no CDN
CManual courier delivery of USB sticks
DSingle EC2 instance in one AZ serving the whole world
Answer & Solution
Correct answer: A. Amazon CloudFront in front of an S3 origin — edge caches absorb most traffic, and CloudFront egress pricing tiers are cheaper at scale
CloudFront amortises egress at edge caches and benefits from tiered edge-egress pricing. The other options are either expensive (direct S3 to internet at global scale) or unworkable.
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