Everything you need to know about HTTP Caching - YouTube

Everything you need to know about HTTP Caching - YouTube:

Benefits for cache

Reduced latency

Cut down the bandwidth

Reduced load on the server

Cache location

Browser cache

Proxy cache

Revered Proxy cache (Server side)

Cache types

Stale Content

Fresh Content

Cache actions

Cache validation

Cache invalidation

How does the content get cached?

HTTP Headers

• cache headers: cache-control (expires, pragma)
• Validators: etag, if-none-match, last-modified, if-modified-since