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Ich versichere, daß die vorliegende Arbeit – bis auf die offizielle Betreuung durch den Lehrstuhl – ohne Fremde Hilfe von mir durchgeführt wurde. Die verwendete Literatur ist im Literaturverzeichnis vollständig angegeben.

I certify that I have conducted this work on my own and no other supporting material has been used other than those which are listed as references.

Bremen, den 13. August 2003

(Niko A. Fikouras)

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“We thought that we were introducing into the world an invention which would make further wars practically impossible”. - the Wright brothers[1]

The dawn of the new millennium has found the world in an increasing state of transit. As mobility is becoming the watchword of our civilisation the way we communicate, socialise and do business is being revolutionised. The capacity of communication networks to overcome physical space with disregard for geopolitical boundaries has enabled people furthest apart to come together. This experience is challenging some of the most fundamental conventions of our societies, forcing our perception of the world to radically change. At the forefront of this revolution is the Internet. Originating from the Advanced Research Projects Agency Network (Arpanet) of the US Department of Defence it has been witnessing tremendous expansion since early 1990 when the US National Science Foundation (NSF) privatised the network. As the Internet is already approximately doubling in connectivity and reach every year, it is being contemplated to connect any device host to a computer of any size to a global Internet. What has started as the research item of a group of people funded by the military has matured into a protocol suite undergoing constant standardisation.

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“The beginning is half of everything”. –Ancient Greek proverb

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“It is impossible for men in the future to fly like birds.Flying is reserved for the angels. Do not mention that again lest you be guilty of blasphemy”. - Milton Wright, 1870, Minister in the Church of the United Brethren in Christ, Father of the Wright brothers

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