The OSI model is a conceptual framework that divides the communication process into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application1.
Each layer has a specific function and interacts with the adjacent layers. The lower layers deal with the physical transmission of data, while the higher layers deal with the logical representation and processing of data1.
UDP stands for User Datagram Protocol, which is a connectionless and unreliable protocol that provides fast and efficient data transfer2.
UDP operates at the transport layer, which is the fourth layer of the OSI model. The transport layer is responsible for providing end-to-end communication between applications, ensuring reliable and ordered delivery of data, and managing flow control and congestion avoidance3.
The transport layer uses port numbers to identify different applications and services, and encapsulates the data from the upper layers into segments or datagrams. UDP uses datagrams, which are simple packets that contain a source port, a destination port, a length, a checksum, and the data payload2.
A technician would view UDP information at the transport layer, because this is where UDP adds its header and performs its functions. UDP information includes the source and destination ports, the length and checksum of the datagram, and the data payload2. Reference:
1: The OSI Model - The 7 Layers of Networking Explained in Plain English
2: User Datagram Protocol
3: OSI model - Wikipedia