This new edition represents a significant update of this best-selling textbook for distributed systems. It incorporates and anticipates the major developments in distributed systems technology. All chapters have been thoroughly revised and updated, including emphasis on the Internet, intranets, mobility and middleware. There is increased emphasis on algorithms and discussion of security has been brought forward in the text and integrated with other related technologies. As with previous editions, this book is intended to provide knowledge of the principles and practice of distributed system design. Information is conveyed in sufficient depth to allow readers to eveluate existing systems or design new ones. Case studies illustrate the design concepts for each major topic.