About the Technical Reviewers
Geoff Tagg runs a small U.K. networking company and has worked in the networking industry for nearly
30 years. Before that, he had 15 years of experience with systems programming and management on a
wide variety of installations. Geoff has clients ranging from small local businesses to large multinationals
and has combined implementation with training for most of his working life. Geoff’s main specialties are
routing, switching, and networked storage. He lives in Oxford, England, with his wife, Christine, and
family and is a visiting professor at nearby Oxford Brookes University.
Sonya Coker has worked in the Cisco Networking Academy program since 1999 when she started a local
academy. She has taught student and instructor classes locally and internationally in topics ranging from
IT Essentials to CCNP. As a member of the Cisco Networking Academy development team she has
provided subject matter expertise on new courses and course revisions.
Jeremy Creech is a learning and development manager for Cisco with more than 13 years experience in
researching, implementing, and managing data and voice networks. Currently, he is a curriculum
development manager for the Cisco Networking Academy Program leveraging his experience as the
content development manager for CCNP Certification exams. He has recently completed curriculum
development initiatives for ROUTE, SWITCH, TSHOOT, and CCNA Security.
Rick Graziani teaches computer science and computer networking courses at Cabrillo College in Aptos,
California. Rick has worked and taught in the computer networking and information technology field for
almost 30 years. Prior to teaching Rick worked in IT for various companies including Santa Cruz
Operation, Tandem Computers, and Lockheed Missiles and Space Corporation. He holds a Master of Arts
degree in computer science and systems theory from California State University Monterey Bay. Rick also
does consulting work for Cisco and other companies. When Rick is not working, he is most likely surfing.
Rick is an avid surfer who enjoys surfing at his favorite Santa Cruz breaks.
David Kotfila, CCNA, CCDA, CCNP, CCDP, CCSP, CCVP, CCAI, teaches in the computer science
department at Rensselaer Polytechnic Institute, Troy, New York. More than 550 of his students have
received their CCNA, 200 have received their CCNP, and 14 have received their CCIE. David likes to spend
time with his wife Kate, his daughter Charis, and his son Chris. David enjoys hiking, kayaking, and
reading.
Dr. Wayne Lewis has been a faculty member at Honolulu Community College since receiving a Ph.D. in
math from the University of Hawaii at Manoa in 1992, specializing in finite rank torsion-free modules over
a Dedekind domain. Since 1992, he served as a math instructor, as the state school-to-work coordinator,
and as the legal main contact for the Cisco Academy Training Center (CATC). Dr. Lewis manages the CATC
for CCNA, CCNP, and Security, based at Honolulu Community College, which serves Cisco Academies at
universities, colleges, and high schools in Hawaii, Guam, and American Samoa. Since 1998, he has
taught routing, multilayer switching, remote access, troubleshooting, network security, and wireless
networking to instructors from universities, colleges, and high schools in Australia, Britain, Canada,
Central America, China, Germany, Hong Kong, Hungary, Indonesia, Italy, Japan, Korea, Mexico, Poland,
Singapore, Sweden, Taiwan, and South America both onsite and at Honolulu Community College.
Jim Lorenz is an instructor and curriculum developer for the Cisco Networking Academy Program. Jim
has co-authored Lab Companions for the CCNA courses and the textbooks for the Fundamentals of UNIX
course. He has more than 25 years of experience in information systems, ranging from programming and
database administration to network design and project management. Jim has developed and taught
computer and networking courses for both public and private institutions. As the Cisco Academy Manager
at Chandler-Gilbert College in Arizona, he was instrumental in starting the Information Technology
Institute (ITI) and developed a number of certificates and degree programs. Jim co-authored the CCNA
Discovery online academy courses, Networking for Home and Small Businesses and Introducing Routing
and Switching in the Enterprise, with Allan Reid. Most recently, he developed the hands-on labs for the
CCNA Security course and the CCNPv6 Troubleshooting course.
Snezhy Neshkova, CCIE No. 11931, has been a Cisco Certified Internetwork Expert since 2003. She has
more than 20 years of networking experience, including IT field services and support, management of
information systems, and all aspects of networking education. Snezhy has developed and taught CCNA
and CCNP networking courses to instructors from universities, colleges, and high schools in Canada, the
United States, and Europe. Snezhy’s passion is to empower students to become successful and
compassionate lifelong learners. Snezhy holds a Master of Science degree in computer science from
Technical University, Sofia.
Allan Reid, CCNA, CCNA-W, CCDA, CCNP, CCDP, CCAI, MLS, is a professor in information and
communications engineering technology and the lead instructor at the Centennial College CATC in
Toronto, Canada. He has developed and taught networking courses for both private and public
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