mp into this technology, and Juha Wiljakka, who taught Teemu the secrets of IPv6 standardization and IETF. Jouni apologies, again, to his wife Hanna for being mentally absent during the furious writing sessions. It was all done at the expense of the family quality time. Jouni also acknowledges the highly skilled folks in Nokia Siemens Networks NeVe labs, Kari Türikainen and Mark Stoker among others, for providing him full access to fool around with the latest software releases and bearing with his newbie questions on the setup details. Gyorgy Wolfner and Giorgi Gulbani provided invaluable insight into 3GPP specification details over the years. The same gratitude also goes to Nokia Siemens Networks Smart- Labs for providing Jouni with the latest IPv6 enabled handsets and native IPv6 Internet access used in the TEKES WiBrA-project. Jouni also thanks Paulig for Presidentti coffee and all the caffeine he got out of it into his veins. Acknowledgments Jonne thanks his wife Anoush, and children Sofia and Matias for their excellent support during this book project, which limited the possibilities to really have quality family time, and doing anything else together other than stay at home. Jonne would also like to thank his manager, Erkki Yli-Juuti at Renesas Mobile, for the support to get through this project. Jonne would also like to thank Bob Hinden, Steve Crocker, Pertti Lukander, David Kessens, Mikko Puuskari, and Jaakko Rajaniemi for the guidance, understanding, collegiality, and support over the years spent learning the 3GPP technology, secrets of standardization, and especially during the transition from telecom to the Internet mindset. In addition, Jonne would like to thank Juha Wiljakka for the excellent cooperation and being a partner in crime in Nokia while working on IPv6 at a time when universal deployment of IPv6 was not quite as obvious as it is today. Finally, we would like to thank friendly people from John Wiley and Sons Ltd, Laserwords Private Limited, and Archive Publications for their assistance in g