server

The date and time that the message was sent.

date

The length of the response body in octets (8-bit bytes).

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

The client or server would like to close the connection.

The time at which the response is considered stale.

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).

WordPress redirect agent.  A value of "WordPress" indicates that WordPress itself redirected the resource.

A cookie sent from the server to be set on the client

Number of seconds until the cookie expires.

The client will only send the cookie when requesting this path, or subdirectories, from the server.

The cookie is only sent when requesting from a https domain.

Prevents access to the cookie through JavaScript.

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

This and all future requests should be directed to the given URI. The request method can change.

Indicates that different content may be provided to different clients, depending on the vary header.

Used to express a typed relationship with another resource.

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.