About the Technical Reviewers

Don Johnston has more than 20 years’ technical, management, consulting, and training experience in networking. He is a certified Cisco Systems instructor and has developed well-received courses and labs. As a consultant, Don has successfully designed and installed LANs and WANs, provided troubleshooting expertise, and managed technical staff for insurance brokerage, reinsurance, and marketing companies. An instrument-rated pilot, Don and his family live in the Chicago area.

John Tiso, CCIE No. 5162, MCSE, CCDP, holds a bachelor’s of science degree from Adelphi University in New York. He currently serves as a customer support engineer in the Cisco Heartland TAC. Before joining the team at Cisco, John was the lead AVVID ...

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