Digital electronics, or digital (electronic) circuits, are electronics that represent
signals by discrete bands of analog levels, rather than by continuous ranges (as used in analog electronics). All levels within a band represent the same signal state. Because of this discretization, relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or parasitic noise do not leave the discrete envelope, and as a result, are ignored by signal state sensing circuitry.
.htaccess is the default name for a file that is used to indicate who can or cannot access the contents of a specific file directory from the Internet or an intranet. The .htaccess file is a configuration file that resides in a directory and indicates which users or groups of users can be allowed access to the files contained in that directory.
A 404 page is a landing page that tells your site viewers the requested page is unavailable or, in some cases, doesn’t exist.
A 404 error tells users the page cannot be accessed – and it can be a major problem.