The term de facto means as much as "created by facts ". This de facto situation is obviously necessary in data communications, information, security and computer technology, since many standardization bodies worldwide are endeavoring to draw up valid and generally binding standards for all the circumstances of the aforementioned fields.
In the course of time, however, certain procedures turn out to be suitable and are declared to be de facto standards, which are then mostly standardized later. Ethernet and the TCP/ IP protocol are such de facto standards, Windows and the SNA architecture are others.
In contrast to the de facto standards are the de jure standards, the legitimate standards that are widely used and officially confirmed.