What it is: AWS Content Delivery Network (CDN) that delivers content via edge locations.
What it’s for:
Speed up delivery of websites, images, videos, APIs (in some cases).
Add security features like HTTPS, WAF integration, DDoS protection (via Shield).
Core components:
Distribution: CloudFront configuration.
Origin: where CloudFront fetches content (S3, ALB, EC2, custom).
Cache behavior: rules for caching, headers, cookies, query strings.
TTL: cache time-to-live.
Exam cues:
“global users, faster static content” → CloudFront.
“reduce load on origin” → caching with CloudFront.
Hard words:
*distribution* /ˌdɪstrɪˈbjuːʃn/: phân phối/cấu hình phân phối
*behavior* /bɪˈheɪvjər/: hành vi (rule xử lý)
*cookie* /ˈkʊki/: cookie
*query string* /ˈkwɪri strɪŋ/: chuỗi tham số
URL *time-to-live (TTL)* /ˌtaɪm tə ˈlɪv/: thời gian sống (thời hạn cache)