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                                                                   Networking for Communications Challenged Communities:

                                                                   Architecture, Test Beds and Innovative Alliances


DTN the N4C way

Delay and Disruption Tolerant Networking (DTN) first evolved under the designation “Interplanetary Networking”, as response

to challenges in space communications.

The problem is not of an extremely sophisticated nature. Basically, the distances become too vast in space, for a normal Internet functionality.

A conversation will “time out” before the round trip is made with the usual “handshakes” that, establish an Internet transfer, before

it is eventually processed.

The first standard document specifying DTN as such, was published 2002 by Vint Cerf and associates. By that time, it had become

clear that the new standard would probably be of use also for situations and locations on earth that, shared the conditions of space communications, namely that they cannot provide short end-to-end delays and stable connections.

Internet protocols used today, especially TCP, and also many applications do not work well on networks that do not match these requirements.

Read article by Dr. Stephen Farrell

Delay- and Disruption-Tolerant Networking – a Very Short Introduction - in English

Redes Tolerantes a Atrasos e a Interrupções – Uma Breve Introdução - em Português

READ ARTICLE BY MR. Elwyn Davies, Folly Consulting Ltd.

Delay- and Disruption - Tolerant Networking - at the Crossroads - in English

This easy-to-understand animation shows how the traffic was organized for the joint Intel and Trinity College Dublin experiments in Lapland 2010.