what’s the difference between Expires and Cache-Control headers?

Question

What’s the difference between Expires and Cache-Control headers?

Answer 1

If you are using a CDN (Cloud Delivery Network) I recommend to use Cache-Control with a max-age time in seconds. For example Cache-Control: max-age=604800. This prevents request-peaks to your origin-server: With "Expires Wed, 30 Oct 20xx 04:37:07 GMT" all browsers will request you at the same time.