Overview
Start with a visitor's request rather than a list of acronyms. Follow name resolution, connections, requests and responses to see what each technology does.
Follow one request
A browser resolves a service address, establishes a connection and sends a request. DNS supplies addressing information, HTTP describes the exchange, and a CDN can participate in delivery.
- Begin with DNS resolution and caching
- Inspect HTTP status codes and response headers
- Separate the client-to-edge and edge-to-origin connections
Explore content delivery
Static files, authenticated pages and video segments have different freshness and access requirements. Cache keys, lifetimes and authorization help you balance speed with correct delivery.
Build a troubleshooting method
Narrow an issue by time, location, hostname and path, then inspect DNS, connections, the origin and policy decisions. These guides explain concepts; validate configurations against your own application.