Content Delivery and CDN Architecture Questions

Design solutions for global content delivery and streaming that balance latency, cost, and operational complexity. Include edge caching strategies, content delivery network selection criteria, origin architecture and failover, cache control and invalidation patterns, time to live planning, signed URL and access control for protected content, streaming and adaptive bitrate delivery considerations, edge compute and request routing, cache prewarming, peering and bandwidth planning, regional compliance and licensing constraints, and operational telemetry such as cache hit ratio and tail latency.