UDP (User Datagram Protocol) Header | Example of UDP Checksum | Realtime application of UDP Protocol

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UDP (User Datagram Protocol) Header | Example of UDP Checksum | Realtime application of UDP Protocol

There are two transport layer protocols: TCP and UDP. TCP – Transmission control Protocol and UDP – User Datagram Protocol. In this post, we will discuss about UDP.

UDP stands for User Datagram Protocol. UDP is a simple, datagram-oriented transport layer protocol. UDP has been designed to transfer data packet over internet. UDP is connectionless protocol provides no reliability or flow control mechanisms. It also has no error recovery procedures. Several application layer’s protocols such as TFTP and the RPC use UDP. UDP makes use of the port concept to direct datagrams to the proper upper-layer applications. UDP serves as a simple application interface to the IP.

need of UDP: TCP proves to be an overhead for certain kinds of applications. The Connection Establishment Phase, Connection Termination Phase etc of TCP are time consuming. To avoid this overhead, certain applications which require fast speed and less overhead use UDP. UDP is used, where acknowledgement uses significant bandwidth along with original data packet.

In this video, I have explained UDP Header structure. Explained all the fields of UDP header. Also explain example of UDP checksum aand realtime example of UDP protocol

Source Port: Source port number identifies the port of the sending application process.

Destination Port: Destination port number identifies the receiving process on the destination host machine.

UDP Length: The UDP length field is the length of the UDP data in bytes. The minimum value for this field is 8 bytes.

UDP Checksum: UDP checksum covers the UDP header and the UDP data. Both UDP and TCP include a pseudo-header with the UDP datagram just for the checksum calculations.
Data: Data field size is variable. It contains user data.

0:00 Introduction
0:08 Introduction of UDP (User datagram protocol)
1:13 UDP header fields (explained one by one)
2:48 example of UDP checksum
3:27 Realtime application of UDP protocol

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