Control options for the current connection and list of hop-by-hop response fields.

The client would like to keep the connection open.

connection

keep-alive

The date and time that the message was sent.

Inform all caching mechanisms from server to client whether they may cache this object.

May be stored by any cache but must be validated by the server.

The time a browser should remember a site can only be accessed with https (seconds).

Indicate a resource should be loaded from a different server while still appearing to be loaded from this server.

The resource has temporarily been moved to another location. This is superseded by 303 and 307.

Standard response indicating a successful action. For GET requests this will be the resource, and for POST it will be the result of the action.