4447f991_P_Guide___HTTP_General_Headers__HTTP_Cache_Control_Directives_HTTP_Message_Type
[Cache-Control Directive] public [Description] Indicates that the response may be cached by any cache, including a shared one (a cache used by many clients). See the topic on caching for more details on shared caches. [HTTP Message Type] 
Response
R e q u e s t o r R e s p o n s e
R e s p o n s e
R e q u e s t
The TCP/IP Guide - HTTP General Headers
HTTP Message Type