Abstract: A distributed system for distributing conferencing data such as video, audio, and other conference data. The distributed system includes a conference data dispatch system, multiple conference participant computing systems, and a network distribution path through which conference data may be distributed from the conference data dispatch system to the various conference participant computing systems. The conference data is segmented. Each segment is encoded to be suitable to a particular class of participant computing systems. The encoded segments may be cached in an intermediary computing system to thereby avoid a strict unicast model for distributing conference data.

Abstract: Managing a web based conference. The web based conference includes one or more presenters connected through a network to one or more conference attendees. The presenters control data sent to the attendees. User input is received at a presenter computing system from a presenter indicating that a message should be sent to a number of computing systems being used by attendees. In response to receiving the user input at the presenter computing system, a message is sent to the of computing systems. One or more acknowledgment messages are received from at least a portion of the plurality of computing systems. Based on the one or more acknowledgement messages, a metric is generated for the number of recipients that received the message. The metric is displayed to the presenter.

Abstract: A distributed system for distributing conferencing data such as video, audio, and other conference data. The distributed system includes a conference data dispatch system, multiple conference participant computing systems, and a network distribution path through which conference data may be distributed from the conference data dispatch system to the various conference participant computing systems. The conference data is segmented. Each segment is encoded to be suitable to a particular class of participant computing systems. The encoded segments may be cached in an intermediary computing system to thereby avoid a strict unicast model for distributing conference data.

Abstract: Managing a web based conference. The web based conference includes one or more presenters connected through a network to one or more conference attendees. The presenters control data sent to the attendees. User input is received at a presenter computing system from a presenter indicating that a message should be sent to a number of computing systems being used by attendees. In response to receiving the user input at the presenter computing system, a message is sent to the of computing systems. One or more acknowledgment messages are received from at least a portion of the plurality of computing systems. Based on the one or more acknowledgement messages, a metric is generated for the number of recipients that received the message. The metric is displayed to the presenter.