This book presents a detailed discussion on data communication and network technologies.Features of the book: ample number of diagrams is used to illustrate the subject matter for easy understanding.A set of appendices on network design and network broadcasting techniques are added for professionals to refer to, design and implement networks in a medium sized organization.Solved test Paper containing objective as well as descriptive questions is added at the end of each br>Chapter so that the readers can evaluate their progress by comparing their answers with the answers given in a book.Set of Sample Papers on the pattern of the past DOEACC ‘a’ level examination are included at the end of book.Comprehensive glossary of technical terms and index are added for easy access to numerous terms needed for understanding the subject matter and finding answers to objective type of questions.Contents: br>Chapter 1: Data communication 1: communication network fundamentals chapter 2: media access control chapter 3: Network components chapter 4: link control and Mac protocolschapter 5: local area network (lan)chapter 6: wide area network (wan)chapter 7: application protocolschapter 8: wireless networks chapter 9: security and management appendix glossary index Sample Paper 1, 2, 3, 4 and 5Specimen answer sheet for objective questions.