This object is used to store information for each and
every Header, either received from the server or sent to
the server. Headers are very important in the HTTP
protocol. Information about connection activity, document
information, and even session information is sent and
received from the server through different Headers. Every
header has its name and some string-type value.
For example, most common headers are
where 'Host' and 'Content-type' are
Header names, and 'my.host.com' and
'text/html' are string-type values.