using study material from 2009: outdated?

PeterRangelovPeterRangelov Posts: 1Registered Users ■□□□□□□□□□
I have a book from 2009
Amazon.com: CompTIA Network+ 2009 In Depth (9781598638783): Tamara Dean: Books

I'm concerned about its relevance to 2012 Network+ exam.
Does the exam content change rapidly? Or should I be fine with a 2009 textbook?

Thanks!!!!

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