List the components of video conferencing system.

A video conferencing system typically includes the following components:

1. Video Input: This is usually a webcam or a video camera. It captures the video feed of the participants in the conference.

2. Audio Input: This is typically a microphone. It captures the audio feed of the participants in the conference.

3. Video Output: This is usually a computer monitor, television or projector. It displays the video feed of the other participants in the conference.

4. Audio Output: This is typically a speaker or a set of headphones. It plays the audio feed of the other participants in the conference.

5. Data Transfer: This is the internet connection that allows the video and audio data to be sent and received. It can be wired or wireless.

6. Codec: This is a device or software that compresses the video and audio data for transmission and then decompresses it for playback.

7. User Interface: This is the software or web application that allows the participants to control the video conference. It includes features like screen sharing, chat, and recording.

8. Echo Cancellation: This is a feature that prevents the audio output from being picked up by the audio input, creating a feedback loop.

9. Network: This is the infrastructure that connects the participants. It can be a local area network (LAN), a wide area network (WAN), or the internet.

10. Server: In some cases, a server may be used to host the video conference. This is especially common in large-scale or corporate video conferencing systems.