error 404
The HTTP 404, 404 Not Found, 404, 404 Error, Page Not Found or File Not Found
error message is a Hypertext Transfer Protocol (HTTP) standard response code,
in computer network communications,
to indicate that the browser was able to communicate with a given server,
but the server could not find what was requested.
The error may also be used when a server does not wish to disclose whether
it has the requested information.
The website hosting server will typically generate a "404 Not Found"
web page when a user attempts to follow a broken or dead link;
hence the 404 error is one of the most recognizable errors
encountered on the World Wide