on the Internet
Over the past
ten years, the Internet has evolved from its initial design to
a network claimed to be capable of supporting virtually any application.
This includes the transport of speech, audio and video flows,
the broadcasting of radio or TV programs, that is, more generally,
multimedia applications. However, these applications place new,
challenging and often stringent requirements on the underlying
infrastructure. Not only the applications must adapt themselves
to the fact that the Internet is the vehicle for transporting
their data, but also the network itself must be able to apply
differentiated treatment to multimedia applications, either to
secure an acceptable level of service, or on the contrary to protect
the other applications from possible abuses of the multimedia
activity. The talk will present a taxonomy of multimedia applications
on the Internet, including IP telephony, videophony, videoconferencing,
or broadcasting, and the requirements they place on the network.
It will describe some of the key enabling technologies, such as
RTP and will address the central question of quality of service.