What are the differences between fully interactive videoconferences and live simultaneous transmissions (e.g., webconferences)?

Fully interactive videoconferences are live programs where participants are seated together (physically) in a group and can see and hear all other participants and faculty who ask or answer a question during the program. Live simultaneous transmission (e.g. webconferences), however, are live programs where participants are either seated by themselves (at their own computers) or in a group, but they do not necessarily see and hear all other participants or faculty who ask or answer a question.