HTTP/1.1 200 OK Date: Wed, 10 Apr 2013 08:42:48 GMT Server: Apache/2.2.3 (Red Hat) Last-Modified: Wed, 10 Apr 2013 08:42:48 GMT Cache-Control: no-store,no-cache,must-revalidate Expires: -1 Content-Length: 1567 Keep-Alive: timeout=5, max=10 Connection: Keep-Alive Content-Type: text/html; charset=UTF-8
Looking at the recent HTTP 1.1 RFC rfc2616 we can see that this options is addressed in more details here:
The original HTTP/1.0 form of persistent connections (the Connection: Keep-Alive and Keep-Alive header) is documented in RFC 2068.
Looking at RFC 2068 we see that it specifies in the paragraph 18.104.22.168 The Keep-Alive Header
The Keep-Alive header itself is optional, and is used only if a parameter is being sent. HTTP/1.1 does not define any parameters.
It doesn't specify anything about max or timeout parameters With Google help I found this RFC draft Hypertext Transfer Protocol (HTTP) Keep-Alive Header. In this one we can see that:
The value of the timeout parameter is a single integer in seconds. The value of the max parameter counts the number of requests since the connection was created.