Vgn - Nebula

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Une nébula ou VGN (virtual glocal network) est l'ensemble organisé des ressources digitales d'une communauté locale globale.

Le concept en a été introduit en 1978 par Vint Cerf dans son projet internet IEN 48 :

"One motivation for [the global catenet] is to permit the internal technology of a data network to be optimized for local operation but also permit these locally optimized nets to be readily interconnected into an organized catenet. The term "local" is used in a loose sense, here, since it means "peculiar to the particular network" rather than "a network of limited geographic extent." A satellite-based network such as the ARPA packet satellite network therefore has "local" characteristics (e.g., broadcast operation) even though it spans many thousands of square miles geographically speaking.
                              Glocal Communities
 +------------+-------------+----------------+------------+-------------------+
 | VGNebula A | VGNebula B  |   VGNebula C   | VGNebula D |     VGNebula E    | 
 +------------+-------------+----------------+------------+-------------------+
 |                          World Digital Ecosystem                           |
 +----------------------------------------------------------------------------+
 |                              Internet Protocol                             |
 +----------------------------------------------------------------------------+
 |                                C A T E N E T                               |
 +-------------+--------------+-----------------+-------------+---------------+
 | local net V | local net W  |   local net X   | local net Y |  local net Z  | 
 +-------------+--------------+-----------------+-------------+---------------+

Chaque nébula dispose d'un VGNIC s'inscrivant dans la dikyologie référentielle du catenet global :

* reprend les éléments globaux consensuels (selon le paradigme de normalisation RFC 6852) pour garantir l'interopérabilité globale.
* documente les zones de paramètrage (protocoles, services, sécurité, topologie, etc.) du MDRS (Multizone Distributed Registry System) qui lui sont propres.