CDN Architecture Diagram
Map edge servers, origin, caching and DNS routing in a content delivery network.
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A CDN architecture diagram shows how a content delivery network speeds up websites by caching content at edge locations close to users. DNS or anycast routing directs each request to the nearest edge server, which serves cached assets or fetches them from the origin on a cache miss. Edge caching, origin shielding, TLS termination and a web application firewall round out the path from user to content.
Frontend engineers, DevOps teams and architects use this diagram to explain latency reduction, cache invalidation and origin offload. It is ideal for documenting how static assets, media and even dynamic content are delivered globally, and how the edge layer both protects and accelerates the origin server.
Great for
- Performance optimization docs
- Infrastructure reviews
- Latency troubleshooting
- DevOps onboarding
- Vendor comparison
Frequently asked questions
What is a CDN architecture?+
A CDN architecture is a network of geographically distributed edge servers that cache content close to users, reducing latency and offloading traffic from the origin server.
How does a CDN work?+
DNS or anycast routing sends each request to the nearest edge server. If the content is cached there it is served instantly; otherwise the edge fetches it from the origin and caches it for next time.
What is the origin server in a CDN?+
The origin is the authoritative source where your real content lives. Edge servers pull from it on cache misses, and an origin shield can reduce how often that happens.
What can a CDN cache?+
CDNs cache static assets like images, CSS, JavaScript and video, and modern CDNs can also cache and accelerate dynamic and API responses at the edge.
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