This handbook provides a descriptive examination of telecommunications networks. It elucidates the basics of fast developing networks as well as the advanced concepts and future expectations of Telecommunications Networks. It recognizes and analyzes the most important research issues in Telecommunication and it consists of information contributed by the top researchers, industry and academic experts. This book also contains surveys of current publications that thoroughly examine important fields of interest like: simulation, optimization problems, etc. The book covers topics like Telecommunications, Traffic Engineering and Routing. It will serve as a good reference for both PhD and MA students.