

This header contains the credentials to authenticate between the user agent and the user-specified server. It allows the proxy server to transmit the request further by authenticating it.

It is a response header gives access to a resource file by defining an authorization method. It is used to request restricted documents. Headers can also be categorized according to how proxies handle them: Entity Header: This type of headers contains the information about the body of the resources like MIME type, Content-length.Response Header: This type of headers contains the location of the source that has been requested by the client.Request Header: This type of headers contains information about the fetched request by the client.

