Howard C. Berkowitz
Howard C. Berkowitz is Chief Technology Officer of Gettlabs and Gett Communications. He is responsible for Gettlabs' virtual labs and his other work includes routing protocol research and design of life-critical medical networks. Current IETF work includes drafts on BGP convergence time, multihoming, and analyzing growth in the global routing table. He is the author or coauthor of several RFCs in IP addressing and international standards in performance testing. He is a member of Team B in the Internet Research Task Force, which is developing requirements for the successor to BGP and works with international operations forums such as NANOG, ARIN, and RIPE.
In the past, he was Senior Advisor, IP Routing, in Nortel's corporate R&D; laboratory. His research interests include the design of next-generation carrier routers, unicast routing protocols (BGP, OSPF, ISIS) and the overall problems of Internet routing system scalability. He was the internal co-manager for Nortel contributions to the Routing Area of the IETF and to the IETF and international operations forums such as NANOG and RIPE.
He became a Certified Cisco Systems Instructor in 1993, doing both network design and education. His certification is inactive because he no longer works for a Training Partner. He contributed to Cisco courses including Cisco Internetwork Design and Advanced Router Configuration as well as to Cisco seminars in switching, virtual private networks, and data-voice-video integration. He has also taught Cisco WAN products, and developed his own seminars in Internet routing with BGP and advanced interior routing and switching.
His operational experience includes consulting on design for a variety of advanced healthcare networks, broadband provider networks, the US government Y2K Information Center, US government networks including the Library of Congress, AT&T;, Lucent, and advising MCI on an assortment of worldwide customer networks.
Howard's latest book is Building Service Provider Networks. His previous books include the WAN Survival Guide , which deals with making choices about which service level agreements are needed and how to select technologies to meet them. His other books are Designing Addressing Architectures for Routing and Switching, and Designing Routing and Switching Architectures for Enterprise Networks. In addition, he has written dozens of articles for the industry press and spoken at numerous trade shows and user groups.
Chris Ackerman works for Dimension Enterprises, Inc. in Herndon, Virginia, as a Senior Internetworking Engineer. He is a Cisco Certified Internetworking Expert (No. 4616), a Cisco Certified Design Associate, and a Cisco Support Pro. He has extensive experience in systems integration and networking in the information technology industry, including Voice over IP system design, development, and implementation and design and installation of LAN/WAN infrastructures. He has also served as Project Manager for Winframe System testing and development and for Novell application testing and deployment. Chris holds a bachelor's degree from Virginia Polytechnic Institute and has completed post-graduate work in Management InformationSystems.
Leigh Anne Chisholm
Leigh Anne Chisholm has developed a strong background in internetworking as an independent technical consultant specializing in internetworking for Cisco environments. She has worked or consulted for a variety of governmental,legal, educational, and commercial organizations which have included Western Economic Diversification (Government of Canada), the law firm of Miller Thomson L.L.P., Legal Aid Society of Alberta, and the University of Alberta.
In addition to her skills as a consultant, Leigh Anne brings her experience as an educator to Certification Zone. She has taught networking at the post-secondary level for the Northern Alberta Institute of Technology, and has co-authored the 1995 release of the New Riders' Publishing, "MCSE Study Guide: Windows 95 and Networking Essentials". She also developed the content at Sybex's CCNA Virtual Test Center.
Leigh Anne holds a Bachelor of Applied Information Systems Technology (Honors), and has completed her CNE, MCSE, CCNA, CCDA, CCNP, and CCDP certifications.
Don Dettmore is a network designer for a leading worldwide IT Solutions provider to the financial industry. He is currently working on two network implementations with Fortune 500 companies.
In addition to writing for Certification Zone, he is co-author of a new book for the CCNP Support exam.
Don's worked with computers for over 10 years. For the last 5 years he has been doing network design and administration. He recently became CCIE #8555. Previously, he earned his CCNP certification and holds CNE and MCSE certifications.
CCIE # 1987, CCDA, CNX Ethernet, CNE, Bay CRS, CBE
Senior Principal Consultant, Netigy
Kevin has over 13 years of experience designing and supporting various
network infrastructures. Kevin has a wide range of past experience
including Banyan Vines, Novell, Cisco Routers and Switches, Bay Routers,
IBM Routers, Cascade Frame Relay Switches, ATM, Cisco and NetSpeed DSLAM
technology (ADSL and DSL), and most recently SONET and Optical
Networking. Kevin has been published on multiple topics to include: "Cisco
CLCS Exam Certification Guide", "Cisco Systems Internetworking Design
Guide", "Cisco Systems Internetworking Troubleshooting handbook", "Cisco
ACRC Exam Certification Guide" and has written various articles for the
Banyan Vines Technical Journal and Enterprise Networking magazine on
topics ranging from IPV6, Private Network Addressing (NAT & PAT), SNA,
Cisco Routers and Designing Large Scale Mobile Access Networks. Kevin
currently resides in Mesquite, Texas with his wife and two children.
Dan Farkas is a General Manager for Advanced Network Information (ANI), a high quality Cisco Learning Partner. He is a Cisco Certified Internetwork Expert (#3800) and Certified Cisco Systems Instructor (#96061). Through ANI Dan not only trains Cisco customers, but also frequently trains Cisco engineers and programmers. For the last 5 years, Dan has been teaching a variety of network configuration, design and troubleshooting classes, including various router, LAN switching and voice/data integration classes. Dan has co-authored a book, published by Cisco Press, titled Cisco Internetwork Troubleshooting. When he's not teaching or writing Dan can be found backpacking and scuba diving around the world or catching some great live music in San Francisco.
Richard Gosney is a Network Consultant working in the UK for Cisco Gold Partner and Advanced Security Specialist, Energis Integration Services. He has several years experience in the Internetworking arena with such companies as Unisys and Anixter, primarily working with IBM Networking Systems, although he is also a CCNP, CCDP and Cisco Security Specialist and is currently working towards the CCIE. He has worked on several corporate
networks for such customers as Marks & Spencer, Scottish Widows, Abbey
National and Barclays Bank.
In his spare time Richard is a musician and was a semi-finalist in the BBC
Young Musician of the Year, he also spends as much time as possible walking
in the English Lake District.
CCNA, CCDA, NNCSE (FR), NNCSS
Annlee is a WAN systems engineer and frequent contributor to
Certification Zone. She has spent the last two years introducing
new hardware and software technologies to WAN systems used around the
world. Her book "Planning for Survivable Networks: Ensuring
Business Continuity", discusses why and how it is necessary to
maintain a network disaster recovery
She is currently working on her next book, more Tutorials for
Certification Zone, and trying to catch up on her certifications.
Dale Holmes is a partner and Senior Technical Consultant for AllNet, LLC in
Baltimore MD. He is CCNA certified, as well as MCSE and CNE, and he holds a
UNIX systems and C programming certificate from George Washington
University. He is the author of the CCNA ExamGear test prep program from New
Riders Press, as well as co-author or technical editor for a number of other
He is currently living in downtown Baltimore, and can often be seen walking
his dog Roxanne through the streets of the city. Feel free to stop him and
ask him questions about Cisco certification.
CCNP, CCDP, MCSE+I, MCT and a dozen other miscellaneous certifications
Dennis has been working in Information Technology for over twenty years, the last
four as IT Manager for a medical products company in Southern California. During
that time, he has worked for several major organizations, including four years as Senior
Network Analyst for Qwest Communications, a tier-one provider. He is the primary
author of the NLI's Study Guide for the CCIE R&S Written Exam, and has developed other
Cisco related training materials for several prominent web sites. He is currently working
on several technical writing projects to finance his primary goal of developing the
largest collection of Cisco shirts in the known world, without completely alienating
his wife and two children.
Chuck Larrieu learned networking as the logical outgrowth of doing technical
support at Merrill Lynch's San Francisco Institutional Sales Office, and
later as Technology Manager for Van Kasper & Company (now a part of Wells
Fargo Investments), at the time a regional brokerage firm headquartered in
San Francisco. It was there that he discovered Cisco routers and switches,
and realized that the future of technology lay in connecting people,
systems, and businesses. He now works as a Design Engineer for SBC DataComm,
a premier network integrator and Cisco Gold Partner. His role is to provide
advice and network designs for complex projects. Chuck currently has no
life, as he continues to prepare for his CCIE Lab.
Barry Meinster, Ph.D. has spent over 30 years in education and IT
training. Dr. Meinster has authored for IDG Books World Wide while assisting
several other publishing and on-line training companies. He is certified in
the following areas; MCT,MCSE,Cisco CCNA,CCNP and Oracle DBA OCP. Currently
he heads Delaware Bay, a Philadelphia-based training company offering courses
for people working toward Cisco's CCNA and CCNP certifications.
Marc R. Menninger
Marc R. Menninger works for Washington Mutual Bank. Marc's background is in secure networking and network performance testing. Marc was a computer/communications officer in the Air Force for five years prior to his happy transition to civilian life in 1997.
Marc received his bachelor's degree in Mathematics from the University of Tampa, where he was also the editor of the University's literary journal. Marc has obtained his CCNA certification and is actively pursuing the CCNP track.
Marc lives in Seattle with his wife Olga and chihuahua Faye. Marc likes to spend his free time going to movies and exploring the city of San Francisco.
Rodgers Moore is a Security and Design Consultant at Data Processing Sciences Corporation, the mid-west's largest privately held communications consulting firm and Cisco VAR.
Rodgers' 20 years of experience in the IT industry began as a contract programmer for Blue Cross/Blue Shield at the age of 15, progressed into starting a Novell and software consulting firm at age 21, that had a good run of 7 years. It was time to move onto something less stressful, like wide area networks. Today, he has completed over 25 industry certifications from companies such as Adtran, Axent, Cisco, Nortel, Newbridge, and AT&T.CCNP-Security; and CCIE(8153) are the most recent additions.
Rodgers is married and has a daughter and son. He spends his spare time being active in church, school and Mensa, coaching U8 soccer, and building a killer robot for next year's BattleBot tournament.
Scott Morris is an independent consultant currently running Uber-Geek Networks. He has two CCIE
certifications (Routing & Switching, and ISP-Dial), CCIE #4713. He also is a Cisco instructor
(CCSI). Working on a variety of projects from VoIP (Call Manager) network design and integration
to cable modem network design and course development to Cisco security consulting, Scott tries
hard to keep busy and not be bored!
John Neiberger is a Data Network Analyst for a bank based in Denver,
Colorado. His background is primarily in routing and switching within an
enterprise environment including IP, IPX, and SNA over a hundred-node
frame relay network, with a little ISDN, DSL, and ATM thrown in. John is
also responsible for ordering, configuring, and maintaining Internet
connectivity for the company, which includes working with BGP, Cisco
load-balancing hardware, and web caching products.
John was an Operations Supervisor at one of the bank branches before he
decided to dive back into a computer-related field. Over the last four
years he has attained the CCNP and CCDP certifications and is working
John is married and has an infant son, Jack, who has turned out to be
quite a distraction from studying.
Priscilla Oppenheimer has been developing data communications and
networking systems since 1980 when she earned her master's degree in
information science from the University of Michigan. After many
years as a software developer, she became a technical instructor and
training developer and taught more than 2000 network engineers from
most of the Fortune 500 companies.
Her employment at such companies as Apple Computer, Network
Associates, and Cisco Systems gave her a chance to troubleshoot many
network design problems and the opportunity to develop practical
methods for network design and troubleshooting. Her books "Top-Down
Network Design" (Cisco Press, 1999) and "Troubleshooting Campus
Networks" (Wiley, 2002) teach those methods.
Priscilla has extensive experience working on Ethernet, Token Ring,
FDDI, ATM, Frame Relay, ISDN, AppleTalk, TCP/IP, and Novell NetWare
networks. She is a Cisco Certified Design Professional (CCDP), Cisco
Certified Network Professional (CCNP), and Certified Network Expert
(CNX) in both Ethernet and Token Ring.
Additional Resources from Priscilla Include:
Troubleshooting Campus Networks: Practical Analysis of Cisco and LAN Protocols
Top-Down Network Design
Galina Diker Pildush, CCIE #3176, JNCIE #18, is with Juniper Networks,
Inc. She provides training and course development for Juniper
Networks, a leading provider of Internet systems. After earning her
M.Sc. in Computer Science, she worked for nineteen years for major
world-wide corporations in the areas of internetwork design,
architecture, network optimization, implementation, project
management, and training.
She has been an academic teacher at York University, teaching Computer
Science, Data Communications, and Computer Network courses. Gaining
extensive technical experience in Internetworking and Cisco-line of
products, she reached her Routing and Switching CCIE certification in
1997. Currently Galina holds a CCIE in IP. Upon achieving her CCIE,
she focused her professional career on training and mentoring CCIE
candidates by becoming the technical director for Netgun Academy CCIE
preparation program at Global Knowledge Network, Inc. Employing her
passion for teaching, Galina has taught a variety of Cisco courses.
Upon joining Juniper Networks, Galina achieved one of the industry
toughest certifications - Juniper Networks Certified Internet Expert
(JNCIE). Galina continues to teach at Juniper, enjoying the state of
the art technology. Areas of interest and specialization are ATM,
internetwork design and optimization, Voice-over IP, VPNs, MPLS, and
Wireless. Galina's most recent book publication is "Cisco ATM Solutions",
published by Cisco Press.
Besides the demanding professional work, Galina, her husband, their 2
children, and their dog, who is a Canadian Champion, enjoy spending
those rare moments together in travels, skiing, and cycling.
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
Rita Puzmanova is an independent networking specialist, writer, course
developer and trainer. Rita has worked independently with two
exceptions: working at ETSI (European Telecommunications Standards
Institute in Sophia Antipolis, a.k.a. French Silicon Valley) and
telecommuting at Cisco Gold Partner systems integrator.
As a former Certified Cisco Systems Instructor (1994-1999), she trained
the European technical audience. She
has developed her own internetworking courses and has also become
involved in on-line web education with her own TCP/IP course offered via
University of California, Los Angeles.
Rita holds an MBA from the University of Calgary, an M.Sc. in systems
engineering (Prague), and a Ph.D. in telecommunications (Prague-Madrid).
Rita has published numerous technical articles and several
books. The most recent book is "Routing and Switching: Time of
Convergence?", published by Addison Wesley.
Rita is multilingual, having lived in many countries (all populated
continents but Australia). She is also interested in non-technical
issues such as creative thinking and holds an Edward de Bono certificate
on General Thinking Skills. Rita's passion are her Cats: Landy, Bubu,
Dolfi, Shimon, Mateesek, Koralek, Puk, Vlchek. Besides bringing her pleasure,
they've helped her become knowledgeable in veterinary science and art.
Additional Resources from Rita Include:
Routing and Switching
(Customers of Certification Zone can purchase Rita's title 'Routing and Switching' and get a 25% discount)
Damarcus has been in the telecommunications industry since 1998. After
receiving his Associates Degree in Electrical Engineering from Columbus
Technical College in Columbus, Georgia, he moved to the VA/DC area to
pursue a career in networking. He has worked for an ISP to establish
new call centers, train analysts and customers on new products and
services, and is currently working in a LAN/WAN environment
configuring routers and documenting procedures. DaMarcus has earned
CCDA, CCNP, Network+, and MCP certifications. He's currently working
toward CCIE certification.
Jason Sinclair is Manager of the Network Control Centre at Powertel, an Australian Telecommunications Carrier. Jason's background is predominantly in large scale IP, Internet, VoIP and DLSW networks. He has designed and deployed several large scale networks that have made extensive use of BGP and MPLS technology. Jason also has extensive experience working with IP and IPX routing protocols, SNA and technologies such as ATM, Frame Relay, ISDN, Token Ring and Ethernet.
He holds the Cisco Certified Internetwork Expert (CCIE #9100) certification and is currently working on a new book that discusses Cisco VoIP technology.
Jason lives in Sydney, Australia with his wife Michelle and son Andy.
Additional Resources from Jason Sinclair Include:
Configuring Cisco Voice Over IP - Second Edition
Michael Sweeney has over twenty years experience as a Network Engineer. He started his networking career using Netware ELS and has become proficient using Solaris, Win2K, and Linux. He holds current certifications as a CCDA, CCNA, MCP, MCSE and is working towards the completion of his CCNP. He successfully completed the Communications and Networking Engineering program though the University of California, Irvine. During his business career, Michael has worked in Aerospace, Healthcare, Accounting and is now in the Financial industry. When time allows, he enjoys mountain biking the local trails or repairing and restoring antique radios.
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.
Ronald Trunk has over twenty years experience in Network Design and System Integration. He has worked or consulted for a variety of governmental, financial, legal, educational and commercial organizations including the U.S. Postal Service, GTE Spacenet, Security Pacific National Bank, Maryland National Bank, the International Monetary Fund, Steptoe & Johnson, LLP, University of California and numerous smaller firms in both the U.S. and Europe.
Ronald has currently been promoted to Network Architect at TimeBridge Technologies, Inc. Ronald is CCIE #5942.
Peter A. Van Oene
Peter A. Van Oene is a consultant in the Professional Services group at Juniper Networks. His current role involves assisting services providers design, implement, and manage next generation packet networks capable of handling the diverse and demanding needs of a commercial Internet.
Peter is the co-author of ICND: Interconnecting Cisco Network Devices, part of the McGraw Hill Technical series. He holds numerous certifications including the Cisco CCNP, CCDP, and CCIE.
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