Etag Header for browser level caching

Hi,

Browser level caching

I need to enable browser level caching.

• Etag

The Etag header is a more sophisticated caching header because various attributes of the file can be combined together (not just the date) in order to generate the Etag (inode number, last modified timestamp & filesize) and therefore more accurately determine that a file has been modified.

The Etag header should be applied to all image file types (.png, .jpg, .gif, .jpeg, etc…), all CSS files (.css) and all JavaScript files (.js).

I want to enable Etag headers on the Apache web server for browser level caching.

Can someone please tell me how to enable Etag headers on Assest?

Thanks

Mohit