CCNP is a higher level of certification as compared to CCNA. While preparing for CCNP certification exam you will learn to install, configure, and maintain larger networks. You need to have a good understanding of the following protocols before taking up CCNP certification: IP, IGRP, IPX, Async Routing, AppleTalk, Extended Access Lists, IP RIP, Route Redistribution, RIP, Route Summarization, OSPF, VLSM, BGP, Serial, Frame Relay, ISDN, ISL, X.25, DDR, PSTN, PPP, VLANs, Ethernet, Access Lists, 802.10, FDDI, Transparent and Translational Bridging.