IP-Traffic Theory and Performance / Edition 1

Reading without meditation is sterile; meditation without reading is liable to error; prayer without meditation is lukewarm; meditation without prayer is unfruitful; prayer, when it is fervent, wins contemplation, but to obtain contemplation without prayer would be rare, even miraculous. Bernhard de Clairvaux (12th century) Nobody can deny that IP-based traffic has invaded our daily life in many ways and no one can escape from its different forms of appearance. However, most people are not aware of this fact. From the usage of mobile phones – either as simple telephone or for data transmissions – over the new form of telephone service Voice over IP (VoIP), up to the widely used Internet at the users own PC, in all instances the transmission of the information, encoded in a digital form, relies on the Internet Prool (IP). So, we should take a brief glimpse at this prool and its constant companions such as TCP and UDP, which have revolutionized the communication system over the past 20 years. The communication network has experienced a fundamental change, which was dominated up to end of the eighties of the last century by voice appli- tion. But from the middle of the nineties we have observed a decisive migration in the data transmission. If the devoted reader of this monograph reads the title ‘IP traffic theory and performance’, she/he may ask, why do we have to be concerned with mod- ing IP traffic, and why do we have to consider and get to know new concepts.