UDP - Header

The header of a UDP datagram is composed of 8 bytes and contains the following fields:

udp-header.png

You can see how simple it is, it has the source and destination port number (this is how we know for which application the data is meant), there’s a checksum and the length.

Links:

https://networklessons.com/cisco/ccnp-route/introduction-to-tcp-and-udp

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