Dear sirs I have two questions about CCNA. 1- What is the best book for reading, to take the CCNA exams. 2- I intend to take the CCNA next summer, and I know that there are two ways to take it. A- One exam (640-801).or, B- Two exams (640-811) and (640-821) which method do you recommend, one exam or two exams. Regards.