CloudFront

💡 Definition

Amazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency and high transfer speeds.

• Edge Locations: CloudFront uses a global network of Edge Locations (Points of Presence) to cache content.
• Distribution: The configuration that tells CloudFront where to get content from (origin) and how to deliver it.
• Origin: The source of your content (e.g., an S3 bucket, an EC2 instance, an Elastic Load Balancer).
• Caching: Content is cached at Edge Locations, so subsequent requests for the same content are served faster.

⚙️ How it Works

1. You configure a CloudFront distribution, specifying your origin (where your content is stored).
2. When a user requests content, their request is routed to the nearest Edge Location.
3. If the content is in the cache at that Edge Location, it's served immediately.
4. If not, CloudFront retrieves the content from the origin, caches it, and then delivers it to the user.

🎯 Use Cases

• Website Acceleration: Speeding up the delivery of static and dynamic website content.
• Streaming Media: Delivering video and audio content.
• API Acceleration: Improving the performance of API calls.
• Security: Integrating with AWS WAF for web application firewall protection.

💰 Pricing Model

• Data Transfer Out: Primarily charged for data transferred from CloudFront Edge Locations to the internet.
• HTTP/HTTPS Requests: Charged per request type.

📝 Exam Tips (CLF-C02)

• CloudFront is a global service that utilizes Edge Locations.
• Main benefits are low latency and improved performance.
• Can be used to deliver content from S3 buckets, EC2 instances, and other origins.

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See Also: * Edge Location * S3 * Route 53