<P> Connectionless communication, often referred to as CL - mode communication, is a data transmission method used in packet switching networks in which each data unit is individually addressed and routed based on information carried in each unit, rather than in the setup information of a prearranged, fixed data channel as in connection - oriented communication . </P> <P> Under connectionless communication between two network end points, a message can be sent from one end point to another without prior arrangement . The device at one end of the communication transmits data addressed to the other, without first ensuring that the recipient is available and ready to receive the data . Some protocols allow for error correction by requested retransmission . Internet Protocol (IP) and User Datagram Protocol (UDP) are connectionless protocols . </P> <P> A packet transmitted in a connectionless mode is frequently called a datagram . </P> <P> Connectionless protocols are usually described as stateless protocols because the end points have no protocol - defined way to remember where they are in a "conversation" of message exchanges . </P>

Explain a connectionless protocol using tcp as an example