This book constitutes the refereed post-conference proceedings of the 28th International Conference, on Distributed and Computer and Communication Networks, DCCN 2025, held in Moscow, Russia, during September 22-26, 2025. The 38 full papers presented in this volume were carefully reviewed and selected from 106 submissions. The papers are organized in the following topical sections: Computer and Communication Networks; Analytical Modeling of Distributed Systems; Distributed Systems Applications.