Cisco dominates the internetworking scene with an over 80 per cent share of the routers used on the Internet. The mid-level Cisco Certified Network Professional (CCNP) certification validates advanced knowledge of Cisco-based networks. The Cisco Internetwork Troubleshooting (CIT) exam, No. 642-831, is one of the four core exams that cover a wide range of topics, including determining an effective troubleshooting strategy at the various layers of the OSI network model. Cisco is in the process of revising the four CCNP exams, covering new technologies and adding new questions to the pool. (Previous ISBN: 0782141528)About the Author:
Arthur Pfund, CCIE #7249, is the Principal Engineer at Charles Schwab in Phoenix. He has over seven years experience in internetworking. Todd Lammle, CCNP, has over twenty years of experience working with various LAN and WANs, and has been working on Cisco router networks since 1986. He is CEO and Chief Scientist of RouterSim, LLC and President of GlobalNet Training, Inc.
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