Certification Zone Study Guides by Howard C. Berkowitz:
Bridging and Switching
IPv4 & IPv6
New Generation of Cisco Switching
Scalable Routing - Link State
Howard C. Berkowitz is Chief Technology Officer of Gett
Communications, where he says he plays doctor, both directly
ministering to networks and also playing a physician on advanced
systems for clinical medicine. Not limiting himself to the
challenges of computers in medicine, he also is using medical and
biological paradigms to deal with the complexity of modern networks.
His interests include high-availability and scalability both in the
Internet and life-critical medical systems. 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. In the Internet Research Task Force, he has
worked on requirements for the successor to BGP and works with
international operations forums such as NANOG, ARIN, and RIPE.
Current medical computing work includes intensive care patient
monitoring, expert systems for prescribing and reducing human error
in medicine, remote viewing of medical imagery, mass casualty
incident support and chemical-biological defense, all under the
stringent privacy rules of HIPAA and other regulations.
In the past, he was Senior Advisor, IP Routing, in Nortel's corporate
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
forums such as NANOG, RIPE and the Internet Society.
He became a Certified Cisco Systems Instructor in 1993, doing both
network design and education before the CCIE even existed. 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, and internal Cisco courses in AVVID design. He has also
taught Cisco/Stratacom switching, 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;
US government networks including the Library of Congress, National
Communications System and Y2K information network;
and large AT&
Lucent, and advising MCI on an assortment of worldwide customer
networks. He first touched a computer in 1966, but strongly denies
that it was a steam-powered Babbage machine.
He was the first technical staff member at the Corporation for Open
Systems, and directly participated in OSI standardization. He also
has contributed to government, national, and international standards
in such forums as ANSI, the Federal Telecommunications Standards
Committee, IETF, ISO, and CCITT/ITU.
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. He
is the author of the networking chapter in Harvey Deitel's widely
used textbook on operating systems.