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Title: Very helpful --especially historically
Review: Working in the IT field, I found this book to be very helpful-- especially from a historical perspective--explaining the various highspeed options available. I read this, although I have been trouble-shooting highspeed issues on a helpdesk, for a long time. When studying for Network +, I read references about T1 lines, and other methods of highspeed access that I have never used, personally, or only used in a corporate office invironment, as a User.This book explains all the (mostly out-dated, in heavily populated areas) technologies, and helps to grasp the basics when studying for the Network+ certification.
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