Appendix K. Topics from Previous Editions
Cisco changes the exams, renaming the exams on occasion, and changing the exam numbers every time it changes the exam with a new blueprint. We then make new editions of the books to match the new exams. (Once we even made a new edition of the book without a new version of the exam, just because it was a long time between new versions of the exam.) As a result, the current CCNA Routing and Switching exam (200-125) is the seventh version of that exam, and the two-book CCNA R&S Cert Guides are basically the eighth editions of the content in these books.
As with every new edition, the book content is based on Cisco’s exam topics; that is, the book attempts to cover the topics Cisco lists as exam topics. However, ...
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