Request Headers

The browser can send headers to the server. Most of these request headers are optional. This section lists some of the commonly used request headers.

Accept

File types the browser can accept.

Authorization

Used if the browser wants to authenticate itself with a server. Information such as the user name and password are included.

User-Agent

Name and version of the browser software.

Referer

URL of the document.

Host

Internet host and port number of the resource being requested.