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This book gives full coverage of all of the basics of data communications including signals, modulation, transmission media, and ECC. It has a comprehensive coverage of OSI and networking protocols with illustrative details of packet and frame contents with emphasis on the first four layers. There is coverage of most important networking technologies including TCP/IP, ATM, ISDN, frame relay and SONET. The many illustrations are appreciated. The book is well written and easy to follow and has excellent breadth of coverage but it does not develop theoretical aspects or mathematics in areas such as modulation or traffic modeling.
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