LCN 97

22nd LCN Technical Program: Tutorials

Last update: 14 October 1997

The Security Requirements of Electronic Commerce

Presenter: Rik Drummond, The Drummond Group

Most electronic commerce will be conducted between business, not between business and consumers. This large volume will be based on Electronic Data Interchange (EDI), the World Wide Web, and real time exchange of documents, paperwork, and payments. The EDIINT IETF WG group has released two papers on the subject which are currently working their way through the RFC approval process. This tutorial will provide real life examples and discuss implementations and interoperability testing for secure EDI and e-commerce.

Level: Intermediate, but also introductory

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Introduction to Wireless Data Communications and Wireless LANs

Presenter: Craig J. Mathias, Farpoint Group

Wireless networking and mobile communications have gone from exotic curiosities to real-world solutions in just a few short years. But the amazing range of products and technologies can be daunting — even networking professionals find the vocabulary alone sets wireless off in a world of its own. This half-day course is designed to provide a quick, concise, and clear introduction to the world of wireless, with a focus on data communications and networking. You'll leave with a knowledge of the buzzwords, technologies, applications, and services available today — what they are, their advantages and limitations, and how to take advantage of them in your own business.

The class is conducted in a highly-interactive fashion, involving students in the discussion and in the consideration of alternatives. Ample time is allowed for questions and consideration of attendee-specific concerns. Anyone taking the course is encouraged to bring questions regarding their own current or prospective applications of wireless technology.

Who Should Attend? Network planners, analysts, and managers requiring a working knowledge of the systems, applications, and issues related to this dynamic, rapidly-changing area, as well as vendor technical, sales, marketing, and management staff who need a broader perspective on products, applications, and the industry. The class will also be of interest to application developers, facilities and telecom managers, and those responsible for corporate information systems. A basic understanding of contemporary data communications and networking (modems, LANs, etc.) is suggested as a prerequisite.

  1. Introductions and Course Overview
  2. Introduction to Wireless Data Communications
    • Why wireless? - The five key motivators and two broad justifications
    • Review of voice and data communications concepts
    • Data networking technology - circuits, packets, and technical issues
    • The ISO model: where does wireless fit?
    • Wireless applications, constraints, and opportunities
  3. Introduction to Radio Data Communications
    • The electromagnetic spectrum and a brief history of wireless
    • Modulation and transmission — propagation and reliability
    • Standards, regulation/licensing, and frequency allocations: Domestic (the FCC) and international issues
    • Spectrum management and multiple-access techniques
    • RF and Microwaves
    • Spread-spectrum communications and the ISM bands
    • Infrared technology: Short-range/IrDA, diffuse/reflective, and directed
    • Security, reliability and integrity
    • Health and safety — worth worrying about?
  4. Local Mobility — Wireless LANs and PANs
    • Problems with wire (and opportunities for wireless)
    • Wireless LAN applications
    • Farpoint Group Wireless LAN Taxonomy: Technologies, topologies, network interfaces, form factors, operational paradigms
    • Who needs wireless LANs? — constituencies
    • The IEEE 802.11 standard (and why it may not matter)
    • Performance issues and high-throughput alternatives
    • In-building and campus mobility: microcellular wireless LANs
    • Limited-distance products: wireless PANs
    • Data radio systems
    • Fixed microwave systems — wireless bridging and internetworking
    • Improving throughput: 10 Mbps, HIPERLAN, and U-NII
    • Metropolitan-area networks (Metricom)
  5. Wireless Wide-Areas Networks (WANs) (time permitting)
  6. The Future of Mobile Computing and Communications (time permitting)

About the speaker: Craig J. Mathias is a recognized authority on data communications and wireless networking, and is a frequent speaker at leading conferences and trade shows. He has also published numerous technical and overview articles in a wide variety of major journals. He is the founder of Farpoint Group, a leading advisory and systems-integration firm specializing in emerging computing and communications technologies. Farpoint Group works with both manufacturers and end-users in technology assessment, strategy development, product specification and design, and the integration of new technologies into new and existing business operations.

Craig holds an Sc.B. degree from Brown University in Applied Mathematics and Computer Science, and was a member of the founding management team at GRiD Systems Corporation, builders of the first laptop computer. He is also a founder and the Chair of the Advisory Board of Wireless LAN Research Labs, at Worcester Polytechnic Institute (Worcester, MA). Craig is a member of the IEEE, the IEEE Computer Society, and the IEEE Communications Society.

Craig J. Mathias can be reached at Farpoint Group, 7 Whippoorwill Lane, Ashland MA 01721; e-mail:; telephone: +1 508-881-6467; fax: +1 508-881-8058.

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TCP/IP: Protocols & Utilities for the Internet

Presenter: Gary C. Kessler, Hill Associates

This tutorial will describe the Transmission Control Protocol/Internet Protocol (TCP/IP) suite from a technology and user perspective. Topics will include the history and evolution of the Internet and TCP/IP; a discussion of the communications protocols comprising the TCP/IP protocol suite; IP addresses and domain names; routing; TCP/IP applications and their use; Internet resources and service providers; justification and business uses of the Internet, and upcoming changes to the Internet and TCP/IP (e.g., new domain naming structure and IPv6). A wide variety of issues related to TCP/IP and the Internet will be described in terms of their underlying concepts, protocols, products and services, and their interrelationships.

Participants will come away armed with a broad understanding of TCP/IP and Internet history, terms, protocols, applications, products, and services. Security issues related to TCP/IP will be addressed where relevant. Students will be prepared to make decisions about commercial products and services. They will also learn ways in which to access information on the Internet using tools supplied with, or based on, TCP/IP.

Course Level: Intermediate. Assumes a basic knowledge of data communications and protocols.

Topics to be covered include:

  1. The evolution of the Internet and the TCP/IP protocol suite
    • History
    • Today's status
    • Future implications
  2. TCP/IP Communications
    • Protocol architecture
    • Network Interface Layer (SLIP, PPP)
    • Internet Layer (IP, addressing, routing, IPv6)
    • Transport Layer (TCP, UDP)
  3. TCP/IP Applications and Utilities
    • Domain Name System (DNS)
    • File transfer (FTP)
    • Remote login (Telnet)
    • Mail services (SMTP, POP)
    • Miscellaneous tools (traceroute, nslookup, whois, finger)
  4. Accessing Internet Resources
    • Tools such as Archie, Gopher, and the World-Wide Web (WWW)
    • RFCs, FYIs, STDs
  5. Connecting to the Internet
    • Service providers
    • Types of connection
    • Cost elements

About the speaker: Gary C. Kessler is the Director of Information Technology at Hill Associates, a telecommunications training, education, and consulting firm headquartered in Colchester, Vermont. Mr. Kessler has been involved in course development, education, and consulting for the computer and telecommunications industries since 1984. His areas of interest include TCP/IP and the Internet, network security, ISDN, packet switching and X.25, LANs, MANs, FDDI, frame relay, SMDS, ATM, and communications standards. Mr. Kessler is the co-author of ISDN (3rd ed.), co-author of Metropolitan Area Networks, and has written over 40 articles for industry publications. A more in-depth bio can be found at his home page at

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New Internet Protocols and their Integration with ATM

Presenter: Dr. Torsten Braun, IBM European Networking Center

Internet protocols and ATM are already today among the most important data communication technologies. This tutorial presents recent developments of the Internet Protocol (IP) and related protocols. The tutorial also shows how IP and ATM can be integrated with technology that is available today or in the near future.

The first part of the tutorial gives an introduction into TCP/IP and newer enhancements for multicast and ATM. IP protocols and ATM are today often integrated based on ATM Forum's LAN Emulation (LANE) and the IETF's Classical IP over ATM (RFC 1577) approach. New extensions such as LANE Version 2 will also be discussed.

The new IP protocol version 6 will be presented in the second part of the tutorial. Several new features such as extended addressing capabilities, automatic system configuration mechanisms, Quality-of-Service (QoS) support, security functions etc. have been added to the next generation IP version. The integration of IPv6 over ATM will be based on recently developed IETF protocol standards such as MARS (Multicast Address Resolution Server) and NHRP (Next Hop Resolution Protocol).

Multimedia and business applications need a certain level of QoS in order to work properly. Within the Internet world, two approaches are currently being implemented. The first one is based on adaptive applications that try to adapt to varying network conditions. This approach is usually based on the Real-Time Transport Protocol (RTP) while the second approach uses the Resource Reservation Protocol (RSVP) for resource reservations in order to achieve guaranteed QoS. This part will also discuss how RSVP and RTP can be integrated with ATM and how RSVP will be able to benefit from IPv6.

The fourth and last part of the tutorial presents new concepts for the integration of IP and ATM from both the ATM Forum and the IETF. MPOA (Multi-Protocol over ATM) will be used together with LANE to realize virtual networks and virtual routers. Like IP Switching, MPOA tries to benefit from high-speed ATM switching in order to implement scalable high-performance IP networks (Internet and Intranets).

The tutorial is intended for network designers, network managers, marketing and management people who want to learn how TCP/IP and ATM will evolve and coexist in the near future.

Course Level: intermediate, assumes a basic knowledge of TCP/IP and ATM.

  1. Basics
    • TCP/IP Basics
    • ATM Basics
    • Classical IP over ATM
    • LAN Emulation
  2. IP Version 6
    • IP Version 6
    • IP Multicast over ATM
    • NHRP
    • IPv6 over ATM
  3. Quality of Service
    • Real-Time Transport Protocol
    • Internet Integrated Services and Resource Reservation Protocol
  4. New Approaches for IP over ATM
    • Virtual LANs
    • RSVP over ATM and IEEE 802.x LANs
    • Multi-Protocol over ATM
    • IP Switching

Torsten Braun received the Diploma degree and the Doctoral Degree in Computer Science from the Technical University of Karlsruhe (Germany) in 1990 and 1993 respectively. From 1994 to 1995 he was a post-doctoral research staff member at the Institut National de Recherche en Informatique et en Automatique (INRIA) Sophia Antipolis (France). Since 1995 he has been at the IBM European Networking Center Heidelberg (Germany) where he is currently working as a senior consultant and project leader on virtual networks over ATM. Torsten Braun is a member of IEEE and ACM and serves for several conference program committees (LCN, IFIP PfHSN, COST 237). In 1996 and 1997 he gave lectures about high-speed networks and protocols at the Universities of Mannheim and Freiburg (Germany). Torsten can be reached by email:

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Satisfying Quality of Service Requirements in Global Multimedia Networks

Presenter: Dr. Yoram Ofek, IBM Research Division

In this course we will study some current trends in network protocols. The tutorial emphasis networking issues which are related to quality of service (QoS). In particular, how the network can satisfy the requirements of new emerging multimedia applications. Therefore, we focus on flow control and traffic management inside the network, and how they affect the end-to-end application performance. This tutorial emphasis issues related to the scalability of various network protocols, and whether or not they can support interactive applications around the globe.

First, we will examine how multimedia traffic can be supported over a local area network with a simple ring or bus topology. Then, we will examine the design challenges for supporting real-time traffic and bursty data traffic over global networks, such as, ATM and the Internet. We will study various possible routing and traffic management techniques for integrating both types of traffic sources on such networks. In addition we will discuss higher layer protocols for real-time traffic in ATM and the Internet, such as, SRTS, H.323, NTP, RTP, RTCP and RSVP.

In particular, we will study and discuss the global scalability of traffic management methods for:

About the speaker: Yoram Ofek received his B.Sc. degree in electrical engineering from the Technion-Israel Institute of Technology in 1979, and his M.Sc. and Ph.D. degrees in electrical engineering from the University of Illinois-Urbana in 1985 and 1987, respectively. From 1979 to 1982 he was research engineer at RAFAEL, Haifa, Israel. From 1983 to 1984 he was at Fermi National Accelerator Laboratory, Batavia, Illinois, and from 1984 to 1986 he was with Gould Electronics, Urbana, Illinois. Since 1987, he has been a research staff member at the IBM T. J. Watson Research Center, Yorktown Heights, New York. Dr. Ofek was the program co-chairperson of the 6th and chair of the 7th IEEE Workshop on Local and Metropolitan Area Networks, he served on various program committees and was a guest editor in several journals.

Dr. Ofek has conceived, initiated and led the research activities into four novel network architectures:

  1. Optical hypergraph for combining multiple passive optical stars with flow control and global synchronization,
  2. Ring networks with spatial bandwidth reuse and fairness, MetaRing, in which key components are used in the SSA standard (ANSI X3T10) and several IBM products,
  3. Embedding of virtual rings in arbitrary topology network, MetaNet, for bursty data traffic with no packet loss, fairness and reliable/real-time broadcast/multicast, and
  4. Global networks for real-time traffic with GPS-based synchronization for providing deterministic quality of service (QoS) guarantees - as in circuit switching.

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