Review CCNA first?

It’s been about 3 years since I studied for my CCNA and almost time to renew it. I want to keep it so I am going to study for the security specialization. I am afraid at this point I remember very little. Should I take time to review everything from my CCNA studies first or will things come back to me as I study the security material. I don’t want to waste time reviewing if I don’t have to.
Comments
Latest blog post: Let's review EIGRP Named Mode
Currently Studying: CCNP: Wireless - IUWMS
Yes, it's worth it to me to renew it. It's what interests me the most, just haven't been able to get a job doing it yet.
Thank you.
I would take a look at the CCNA Security objectives and see what overlaps.
BTW if you CCNA is already expired you will not obtain the CCNA: Security until you re-certify your CCNA, since CCNA is a pre-req for the CCNA: Security
Latest blog post: Let's review EIGRP Named Mode
Currently Studying: CCNP: Wireless - IUWMS
Yeah, I have started to review. I am surprised at how much I actually remember. I think it is going to be a quick review.