them once one has found them). In contrast, IP-oriented network management expertise is prevalent. Right or wrong, the current Internet/intranet infatuation only strengthens the position of IP-networking. Still, IP was designed in the 1970s when interactive multimedia over packet-switched networks was hardly conceivable; no matter what tires, engine, and transmission one puts on a '62 Dodge Dart, it is still a '62 Dodge Dart. ATM would seem to be the future. It apportions bandwidth in a connection-oriented arrangement, and thereby accommodates multiple streaming data flows. IP-based connectionless networks transmit in bursts and force video and audio streams to adapt, if not suffer. ATM has an inherent provision for service quality. IP-based protocols are being retrofitted to meet this requirement. ATM can support TCP/IP traffic and any other type of traffic, both gracefully and with applications-specific adaptation layering. IP-based protocols do their best to adapt, but their best is often contrived and awkward. ATM upgrades are expensive but applications such as Real- Time streaming media are motivating organizations to take a second look. We will discuss ATM in greater depth in the following chapter as we move downward in the stack to look at physical and data-link layer transmission systems. Video Communications: The Whole Picture CHAPTER 10 REFERENCES Baker, Richard H., "Fighting fire with firewalls," InformationWeek October 21, 1996 (Computer Select). Comer, Douglas E., Internetworking with TCP/IP Volume I: Principles, Protocols and Architecture, 2nd edition, Prentice Hall 1991. Coy, Peter, Hof, Robert D., Judge, Paul C. "Has the Net finally reached the wall?" Business Week, August 26, 1996 n3490 pp. 62-67. Crotty, Cameron. "The Revolution will be Netcast," Macworld October 1996 v13 n10 PP. 153-155. Frank, Alan. "Multimedia LANs and WANs," LAN Magazine July 1996 v11 n7 pp. 81- Fulton, Sean. "Steaming multimedia hits the 'net," CommunicationsWeek July 22, 1996 n620 p. 52-58. Kosiur, Dave. "Internet telephon