 Usually this option is also configurable.A scheme where web server serves a default file on per-subdirectory basis has been supported as early as NCSA HTTPd 0.3beta (22 April 1993), which defaults to serve codice_1 file in the directory.This scheme has been then adopted by CERN HTTPd since at least 2.17beta (5 April 1994), which its default supports codice_9 and codice_10 in addition to the NCSA-originated codice_1.