Question: can i take icnd2 before icnd1?
Answer: Yes, you can do them out of order. The only thing, you will only get your CCNA once you have passed ICND2 and you meet the prerequisites, i.e. passed ICND1. So, if you pass ICND2 first, then on November 1st you pass ICND1, then you'll get both the CCENT and the CCNA certification dated on November 1st.