Unlock the world of Data Communications and Networks with this comprehensive textbook, perfect for undergraduate engineering students in Computer Science, IT, Electronics & Communications, and Electrical disciplines, as well as MCA and B.Sc/M.Sc (IT) students. “Data Communications and Networks” offers an exhaustive and up-to-date exploration of essential topics, prioritizing conceptual understanding through a clear layered approach. The book guides you from fundamental principles to detailed network layers, featuring dedicated chapters on cryptography and network security. Enhance your learning with practical analogies and reinforce your knowledge with review questions, numerical problems, and multiple-choice questions at the end of each chapter. Your essential guide for mastering data communication concepts.