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Learn more about the networking professionals who lend their experience to help you achieve your goals

To create its highly regarded networking information products, Certification Zone relies on the highest editorial standards. Other companies often use inexperienced or uncertified networking professionals to save money and cut corners. Certification Zone has always relied on a skilled group of world-class experts, who are certified and experienced, to write and develop our Cisco certification preparation products.

Technical Director Howard C. Berkowitz
Annlee Hines Barry Meinster Chris Ackerman Chuck Larrieu Dale Holmes Damarcus Richards Dan Farkas David Wolsefer Dennis Laganiere Don Dettmore	Galina Pildush Jason Sinclair John Neiberger Katherine Tallis Kevin Downes Keyur Shah Leigh Anne Chisholm Marc R. Menninger Marianne Lepp Mark Poplar	Mike Sweeney Peter A. Van Oene Priscilla Oppenheimer Richard Gosney Rita Puzmanova Rodgers Moore Ronald Trunk Scott Morris

Katherine Tallis

Certification Zone Study Guides by Katherine Tallis:

Firewalls

OSI Reference Model, 2nd Ed.

Katherine Tallis is a senior WAN Engineer with Lockheed Martin Corporation. While working as a graduate student in Psychology she started writing statistical programs for mainframe computers and eventually migrated into technical support and consulting.

She has spent more than 15 years working in Federal and private industry on networks ranging from a single office with a handful of devices, to global WANs with hundreds of routers, Novell servers, and workstations.

Katherine has completed her CCNA, CCNP, and Cisco Security Specialist certifications and is currently working on her CCIE.

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