UDP is a non-connection oriented protocol. That is, when machine A sends packets to machine B, the flow is unidirectional. The data transfer is made without warning the recipient of machine B, and the recipient receives the data without sending a confirmation to the sender of machine A.

This is because the data that's sent by the UDP protocol does not allow you to transmit information related to the sender. Therefore, the recipient will not know about the sender's data, except their IP address. Let's have a look at some properties of the UDP protocols:

• Unreliable: In UDP, there is no concept of packet retransmission. Therefore, when a UDP packet is sent, it is not possible to know whether the packet has reached its destination since there are no errors in the correction mechanism.
• Not ordered: The order in which packages are sent and received cannot be determined.
• Datagrams: The integrity of packet delivery is done individually and can only be checked to ensure that the packages arrived correctly.
• Lightweight and speed: The UDP protocol does not provide error recovery services, so it offers a direct way to send and receive datagrams through an IP network. It is used when speed is an important factor in the transmission of information, for example, when streaming audio or video.