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To create its highly regarded networking information products, 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. Instead of using just one or two networking professionals to address the multitude of topics addressed on Cisco's certification exams, Certification Zone finds experts in each topic who have hands-on field experience with the technologies they cover for our site.

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

David Wolsefer

Certification Zone Study Guides by David Wolsefer:

AAA

Bridging

Frame Relay

ISDN

ISDN and DDR

Multicast

Security

David Wolsefer is the East Coast Senior Networking Engineer for Totality, a leading Managed Services Provider (MSP) headquartered in San Francisco. David is a Cisco Certified Internetworking Expert (CCIE) #5858 in Routing and Switching and is currently scheduling a lab date to attempt a second CCIE in the Communications and Services track. David is also a Microsoft Certified Systems Engineer (MCSE). His areas of expertise include LAN/WAN infrastructure, network security, and IDC/ASP data center design and implementation. David holds a bachelor's degree from the University of Florida and has completed extensive post-graduate work in Applied Mathematics.

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