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Meet the Experts

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 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.

Galina Pildush

Marvin Greenlee

Priscilla Oppenheimer

Shirley Myers

Mark Poplar

Certification Zone Study Guides by Mark Poplar:

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Mark Poplar is an accomplished network engineer with extensive experience designing networks, installing and configuring routers, switches, servers, and other Cisco and Microsoft products. A team leader at a network consultancy firm, he provides technical support and troubleshooting services to more than one hundred mid-sized corporations. He holds eight professional certifications, including CCDA, CCNA, MCT, MCSE, MCP, and CAN.

A graduate of California State University and Kent State University, he has published three books, Prep Guide for the CCDA Exam, Cisco CCNA Routing and Switching Exam Prep, and CompTIA's Network & Exam Prep. He has also contributed to Microsoft Certified Professional magazine.

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