HTTP Status Code 421 refers to Misdirected Request. This status code indicates that the server is unable to produce a response for the request because the request was directed to a server that is not able to produce a response for that specific request.
Essentially, when a client sends a request to a server that is not configured to handle that specific request, the server responds with 421, letting the client know that the request was misdirected and should be sent to a different server. This status code helps to inform the client of the mistake in routing the request, ensuring more efficient communication between the client and server.