404 Error Pages When we browse the web and a particular page can not be found by the browser, we are served an error page by the server of the web site we are visiting, called 404 (which means that the page does not exist). When communicating via HTTP, a server is required to respond to a request, such as a web browser's request for an HTML document (web page), with a numeric response code and an email-like MIME message. In 404 Error - the first 4 indicates a client error such as a mistyped URL. The middle 0 refers to a general syntax error. The last 4 just indicates the specific error in the group of 40x, which in this case is . Benefits: These customized 404 error pages serve the purpose of offering the web site user an apology or alternative way of finding back into the content the web site deals with , or both. Each response code has an associated string of English text that must also be present; response code 404's associated string is "N...