Is there a lt;meta gt; tag to turn off caching in all browsers? The list is just examples of different techniques, it's not for direct insertion If copied, the second would overwrite the first and the fourth would overwrite the third because of the http-equiv declarations AND fail with the W3C validator At most, one could have one of each http-equiv declarations; pragma, cache-control and expires
what is difference between HttpCacheability. NoCache and . . . Similar to the NoCache option Clients receive a Cache-Control: no-cache directive but the document is cached on the origin server Equivalent to ServerAndNoCache ServerAndNoCache Applies the settings of both Server and NoCache to indicate that the content is cached at the server but all others are explicitly denied the ability to cache the
Difference between Pragma and Cache-Control headers? Pragma is the HTTP 1 0 implementation and cache-control is the HTTP 1 1 implementation of the same concept They both are meant to prevent the client from caching the response Older clients may not support HTTP 1 1 which is why that header is still in use