We are pleased to present this edition of forouzan's data communications and networking. It has been developed specifically to meet the need of students of computer networks. In addition to a chapter on the peer-to-peer paradigm, a full chapter on quality of service (qos), generous coverage of forward error correction, coverage of wimax and material on socket-interface programming in java, we have added new end-of-chapter questions and problems to make the content more relevant and improve learning outcomes for the student. Salient features:follows visual approach which gives the reader the opportunity to understand the networking concept with real-life application orientation.coverage of encryption, security and synchronization in multi-processor systems is included with up-to-date information in the field. Demonstrate key issues concerning concepts and techniques through examples and case-studies. - from Amzon