The book "Optical Network Design and Modeling" offers a comprehensive insight into the rapidly growing field of optical networks. It documents the results of the 11th International Conference on this topic, which brought together scientists and researchers to exchange ideas and current work. The conference showcased significant advances in the development and implementation of high-speed networks. The published conference contributions include both invited talks and submitted papers selected from a wide range of submissions. The topics covered range from the latest developments in optical network technology to the challenges of implementing these concepts. This professional book is a valuable resource for anyone involved in the technical and business aspects of optical networks.