When it comes to CCNP, you can never have too much of preparation. What you need to fear and be cautious of is having too little preparation. The CCNP certification consists of a battery of exams all highly technical in nature and it will be a grueling course to take for hours. However, despite its difficulty the benefits you can reap from it is enough to handle it all.
The CCNP is one of the advanced levels of Cisco certification. This is because it does not just deal with networks per se but it aims to gauge one s knowledge when it comes to building routers and making a client server work amidst a vast complex intranetworks working closely together. When it comes to businesses, networks do not operate on their own. Though they me be a core for a certain aspect, they still needed to work with other networks in order to sustain the business. The CCNP deals with those multifunctionings and multilayering concerns of network to network establishments.
So if you want to really prepare for the certification, you should consider reading about CCNP books. Although there are plenty of resources you can find online, you should also care to look for CCNP books in paperback or hardbound form. Nothing beats owning a copy and there are lots of venues for you to get a hold of such. CCNP books will present to you in detail everything you need to know about switches and routers in multiple setups. It will also provide you with diagrams and other reference points.