Patrick J. Conlan, CCNA, CCDA, CCNP, CCSP, is a senior staff instructor and consultant with GlobalNet Training, Inc. He focuses primarily on Cisco certification topics and also provides consulting services to large companies of all types. Patrick spent ten years in the U.S. Navy as a communications technician and IT instructor, where he taught numerous courses ranging from basic computer networking to advanced IP system integration and design. He also developed IT curriculum materials that the U.S. Navy still uses today.