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2- The book structure is very good, ccna 200 301 how many questions you can build up the full picture through the chapters even if you have no knowledge with the world of Cisco voice (which I didn't have). - The amount of information about each part is adequate, written in a short way, and the writer doesn't get you lost into deep details, which is the way I prefer, maybe other readers prefer the long detailed way!? ccna 200 301 how many questions