The book has been written in such a way that the concepts are explained in detail, giving adequate emphasis on examples. To make clarity on the topic, diagrams are given extensively throughout the text. Various questions are included the vary widely in type and difficulty to understand the text. The book discusses design issues for phases of Distributed System in substantial depth. The stress is more on problem solving. The students preparing for PHD entrance will also get benefit from this text, for them, University questions are also given.