Enterprise-grade caching architecture with multi-layer cache hierarchy

Multi-layer caching uses browser, Service Worker, and CDN layers together for optimal performance.

Enterprise PWAs implement hierarchical caching: (1) browser HTTP cache, (2) Service Worker Cache API, (3) IndexedDB for structured data, and (4) CDN edge caching. Each layer serves different purposes. SW decides whether to serve from cache or network, while CDN reduces latency globally. Coordinating TTL, cache headers, and SW strategies is essential to avoid stale data conflicts.