Adaptive applications, those that can adapt their resource requirements to variations in network resources, can provide a significant reduction in Internet congestion. In addition, adaptive applications can offer much better quality to end users than can non-adaptive applications under varying network conditions. Such applications will represent an important piece in the solution to the current Internet congestion control/QoS (quality of service) problems. The technology for making audio and video applications adaptive has been under development by researchers over the last 10 years. Applications built on protocols that do not do congestion control can hamper the performance of the Internet. TCP backs off in the face of congestion but other transport protocols, such as UDP and RTP, do not, and thus can contribute significantly to network congestion. Many Internet researchers and developers have come to believe that the network forwarding devices (e.g. routers) must do internal congestion control in order to provide robust and viable network service. A variety of schemes have been suggested for policing traffic and managing router buffer queues. In such a controlled environment, non-adaptive applications will fare badly while those applications which can adapt will provide better performance to the user. This BOF will consider what can constructively be done to further the development of adaptive applications. For example, what additional protocol support is needed from RTP? While the technology for making applications adaptive, does not require standardization, it would be helpful to publish an Informational RFC which states what behavior is required from applications to perform well in the Internet today and in particular in an Internet where the routers implement internal congestion control. It would also be useful to make clear the issues involved in constructing adaptive applications, and to show some example mechanisms and algorithms which are known to work. This BOF focuses on best-effort traffic, rather than traffic for which QoS reservations of some kind have been made (by RSVP for example). It is reasonable to expect that best effort traffic will be the bulk of the Internet traffic in the near future.