You can see all header generated in a browser by accessing a JSP/ASP/PHP or any page that will dump the headers.
You can find some samples on the web by googling ...
http://www.roseindia.net/jsp/request-header-jsp.shtml
http://www.plus2net.com/asp-tutorial/http-header.php
You will see headers like
HTTP_CACHE_CONTROL:no-cache
HTTP_CONNECTION:Keep-Alive
HTTP_CONTENT_LENGTH:0
HTTP_ACCEPT:image/gif, image/jpeg, image/pjpeg, application/x-ms-application, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-ms-xbap, */*
HTTP_ACCEPT_ENCODING:gzip, deflate
HTTP_ACCEPT_LANGUAGE:en-us
HTTP_AUTHORIZATION:SiteMinder
HTTP_COOKIE:SMSESSION=xxxx
HTTP_HOST:xxxxx
HTTP_REFERER:xxxx
HTTP_USER_AGENT:Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)
HTTP_SERVER_PROTOCOL:HTTP/1.1
HTTP_SM_TRANSACTIONID:000080fe00000000ff565002370c86fe-1614-515bd6dc-14e0-03b06ea7
HTTP_REQUEST_METHOD:GET
HTTP_SM_SDOMAIN:.ca.com
HTTP_SM_REALM:protected
HTTP_SM_REALMOID:06-bc562e34-431d-448b-acb9-41a488ad9815
HTTP_SM_AUTHTYPE:Form
HTTP_SM_AUTHREASON:0
HTTP_SM_UNIVERSALID:u1
HTTP_SM_AUTHDIROID:0e-708076a1-a9f1-4445-bf4a-1924c8740616
HTTP_SM_AUTHDIRNAME:***
HTTP_SM_AUTHDIRSERVER:***
HTTP_SM_AUTHDIRNAMESPACE:LDAP:
HTTP_SM_USER:u1
HTTP_SM_USERDN:cn=u1,dc=ustore,dc=com
HTTP_SM_SERVERSESSIONID:GzZSs+9IALZ8u5NpSkKSDMm3bG0=
HTTP_SM_SERVERSESSIONSPEC:ukPWMESmaSIMYAkWgXB99D327OQfXFweu49u1tgpRtc4lqzbQPA/URlmkM7tigsgKj+qMd8PKqIy8d4mqcc47cpSUtTFwaMjM00kL4MMJYnHujH0f3wmt3t/oPlGeuq4NVJMaunnSYwF4fn9+13FHwUho4HvW+BDFv6LENqzqzCG9Tsrtki5L/QxnkmEOGaapZ2uYSQLxwKzmNFAK3dX2wxByT3ZfL8cc5V9APm+W+zLytNrsgFMEtZSMLlkXGifKG+/hiZOiTu/2Bcg5dY17RW77PN33dj8FYLOPo2c70W0ErSLQs3BVwRbikkfd9lpoJLrKIkw6RapwhH0YFVXzqVwjSOmrrmR+oYZkEtwC22PZcWTfk3p9ogkpJ/buNA9vM3JG9LhN7k=
HTTP_SM_TIMETOEXPIRE:7199
....