The Real-time Transport Protocol is a network protocol that enables the Voice Over Internet Protocol by delivering streaming audio and video content over the internet (VoIP).
The datagram-oriented protocol is UDP. It is thus because none of the overhead associated with creating, maintaining, and closing connections exists. A network's ability to send audio and video depends on the RTP internet protocol. Designed for reliable live data delivery, the Real-time Transport Protocol (RTP) is a network standard for sending audio or video data. It is utilized in voice over IP, video telephony, and internet telephony. In the OSI model, RTP belongs to both the Presentation Layer (Layer 6) and the Session Layer (Layer 5).
If you send a photo to a person, you need to be very careful not to send something that can give your information away, this includes but it not limited to Pictures of your town, Pictures of You, Pictures of Friends, Pictures of Family, etc.