This book attempts to provide a unified overview of the broad field of Data-Communication, Computer Networks and Distributed Systems. The Organisation of the book reflects an attempt to divide these subjects into comprehensible parts and to build step by step, a survey of the state of the art. This book emphasizes basic principles and topics of fundamental importance concerning the technology and the architecture of this field as well as providing a detailed discussion of lead-edge topics. This book is intended for the benefit of undergraduate students, introductory post-graduate courses like B.E./B.Tech., MCA, MCM and various other diploma courses in computer sciences. It can be used for sole self-study purpose too. This book contains descriptive and objective questions in plenty. These are beneficial for the students preparing for various competitive examinations and for those going for open and campus selection procedure. I have taken a bottom-up approach on TCP/IP layer, addressing the issues related to design of data communication, computer network and distributed systems Table Of Contents: 1. Introduction to Data Communication 2. Data Communication Networks and Technologies 3. Protocol and Protocol Architecture 4. Model of Internet 5. Data Communication Bascis 6. Data Link Layer 7. Network layer 8. Transport Layer 9. Application Layer 10. Distributed System 11. Appendices, Glossary Index Subjects: Computer Networking,Computer Science and IT - from Amzon