The MBone is an experimental virtual subnet of the Internet, for the utilization of multicast IP traffic. Multicast is especially suitable for broadcasting data at a high rate to a large number of hosts on the network. Multicast avoids the multiplication of data traffic when sending the same data to several closely situated hosts. Videoconference is the primary application of the MBone. The MBONE videoconference toolkit contains tools for transmitting audio, video, a shared workspace manager, and a session directory which solves the announcement and organization of videoconference events on the MBone. In this paper these tools are described together with our experiences during the broadcast of the JENC7 conference
