Correct Answer - Option 3 : Audio-visual two ways
Video conferencing is a type of online meeting where two or more people engage in a live audio-visual call. In business, people typically use video conferencing to communicate and collaborate within and outside an organization.
Video–conferencing:
- Video conferencing boosts productivity saves time, reduces travel expenses, and overall promotes collaboration.
- The advantage of video conferencing is the ability to facilitate all of those benefits without requiring constant travel for face-to-face communication.
- Two (or more) people communicate through audio and video.
- Videotelephony comprises the technologies for the reception and transmission of audio-video signals by users in different locations, for communication between people in real-time.
- A videophone is a telephone with a video display, capable of simultaneous video and audio for communication between people in real-time.
- Videoconferencing implies the use of this technology for a group or organizational meeting rather than for individuals, in a videoconference.
- Telepresence may refer either to a high-quality videotelephony system (where the goal is to create the illusion that remote participants are in the same room) or to meetup technology, which goes beyond video into robotics (such as moving around the room or physically manipulating objects).
- Videoconferencing has also been called "visual collaboration" and is a type of groupware.
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One-way communication flows from a sender to a receiver, but nothing goes back in return. The sender can use one-way communication to inform, entertain, persuade or command the audience. Some examples of one-way communication include television, radio, writings, speeches and performances.
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Teleconferencing means meeting through a telecommunications medium. It is a generic term for linking people between two or more locations by electronics. There are at least six types of teleconferencing: audio, audio graphic, computer, video, business television (BTV), and distance education. The methods used differ in the technology, but common factors contribute to the shared definition of teleconferencing:
- Some of the most common examples of two-way communication systems are the radio, telephone, and computer-aided dispatch systems used by police, fire, and emergency response personnel.
Therefore Audio-visual two ways are the correct answer.