First, congratulations on reading every chapter, doing every lab, and practicing everything that was required of you to obtain your CCNA 200-125 certification. The dedication and fortitude that you have shown will bear the fruits of your labor. In this book, we covered everything you need to know to pass your certification.
I have covered certain topics that you will not see, but I let you know ahead of time. We have covered logical models, IP addressing, switching, routing, security, NAT, and many sub-topics within those I mentioned.
If you did all the work and did research as you were reading, you will have no issues passing your certification , whether you take it in two parts or just one.
Always keep this in mind: no matter what certification you are taking, there is just no way you can know every possible scenario you may run into. You must understand the concepts...