Brian Madden has recommitted himself to completing the upcoming CPS 4.5 book. Brian is approaching this book in a slightly different approach than previous books. In the new CPS 4.5 book, Brian will be writing chapters and releasing them online immediately in a brand new content management system built by Brian’s web developers. This will allow for immediate release of new information, as well as corrections and community feedback. To this end, Brian has released Chapter 3: Network architecture.