Network and Content Delivery
CoreAmazon CloudFront
Explicit caching, content distribution, scalability, and troubleshooting decisions.
Key points
- CloudFront distributes and caches HTTP content through origins, behaviors, cache policies, certificates, logs, and origin failover.
Best-known use cases
- D2.1, D2.2, and D5.1: correct cache, origin, TLS, or delivery behavior for a named HTTP workload.
What candidates often confuse it with
- CloudFront caches content near viewers; Global Accelerator accelerates supported endpoint traffic without caching and ElastiCache caches application data.
Key takeaway
For CloudFront failures, separate DNS, TLS, cache key, TTL, edge log, origin health, and application response.
Related services
- Amazon Application Recovery Controller
- AWS Client VPN
- Elastic IP addresses
Relevant exam tasks
- D2.1 — Task 2.1: Implement scalability and elasticity.
- 2.1.1 — Configure and manage scaling mechanisms in compute environments.
- D2.2 — Task 2.2: Implement highly available and resilient environments.
- 2.2.1 — Configure and troubleshoot Elastic Load Balancing (ELB) and Amazon Route 53 health checks.
- D5.1 — Task 5.1: Implement and optimize networking features and connectivity.
- 5.1.1 — Configure a VPC (for example, subnets, route tables, network ACLs, security groups, NAT gateways, internet gateway, egress-only internet gateway).