Abstract : The practice of the Net art toughens the question of the communication potential of a media - Internet - that constitutes all at once the technical support, the creative tool and the social device of the artwork. His specificity lies in this conjugation of a technical configuration and of a social ritualized occasion. The TIC place in fact the artwork to the heart of a socially distributed negotiation between the artist and the public. The text is focused on this collective construction of the Net art. It shows the artistic work and the technical configurations that compose the frameworks of the experience of the Net art. A typologie of the artworks offers to distinguish faces of the interactivity, such as they are foreseen to the heart of the technical environment, and the interaction methods that they deploy heading for the public.