CCNP
Prerequisites. There are no formal prerequisites for CCNP Enterprise, but you should have a good understanding of the exam topics before taking the exam. CCNP candidates often also have three to five years of experience implementing enterprise networking solutions.
CCNA
There are no formal prerequisites for CCNA certification, but you should have an understanding of the exam topics before taking the exam. CCNA candidates often also have: One or more years of experience implementing and administering Cisco solutions. Knowledge of basic IP addressing.