I'm working on the CCVP certification, the problem is, as I'm progressing I have the feeling that I'm forgetting the thing I have already learned. I passed QOS, CVOICE, and CIPT, and honestly I don't remember all the stuff I learned in CVOICE or QOS. I think it's due to the fact I'm not working in the IPT environnement (working in routing stuff only). VOice is very complicated, they are too many protocols that do roundabout the same things... CCNP is easier. is it normal to forget sometimes the things we've already learned !!!