Answer:
User Datagram Protocol (UDP) , transport-layer segment.
Explanation:
The User Datagram Protocol is popularly known as UDP. It is defined as the communication protocol which is used across the internet for any time sensitive transmission like the DNS lookup or the video playback.
The UDP provides a unreliable and connectionless service to a invoking application.
The transport layers on sending side converts the application messages which it
from the
into a transport layer segment called as the transport layer segments. This is achieved by breaking down the application messages into a smaller chunks and then adding the transport layer header into each chunk so as to create a transport layer segment.