Webmaster wrote: Not very realistic and quite different (I used to have them both). CCNA covers a lot of 'configuring' which is not the case for the CCDA.
Webmaster wrote: Although they are both at the same level and cover similar topics/technologies/concepts, the CCDA is more theoretic and covers them from a different angle.
Webmaster wrote: There is overlap but preparing for one won't be enough to pass the exam of the other. The CCDA exam consist of case-studies, in which you get information and demands from various people in the organization and based on that you need to select proper solutions. As you can see in the CCDA exam objectives, they all start with 'Describe', 'Identify' or 'Select'. Very simply put: CCNA is doing it, CCDA is talking about it.