MTU stands for Maximum Transmission Unit. The MTU size essentially describes the maximum possible size of a data packet to be transmitted.
The MTU size (Maximum Transmission Unit) essentially determines the maximum possible size or length of a data packet that can be transmitted via a transmission system, such as the Internet. In general, the MTU is limited upwards by the maximum transmission unit, but may be smaller. However, the smaller it is, the greater the fragmentation of the user data to be transmitted.
To illustrate: The upper limit can be compared to the height limit for highway underpasses or bridges. Trucks or cars that exceed this height cannot pass. The same applies to packets that exceed the MTU of a network: They cannot be transmitted. Instead, they are divided into several smaller data units, transmitted in chunks and reassembled at their destination. Just as if you were to dismantle a vehicle, take it through the tunnel in individual parts and reassemble it at its destination.
In addition to the pure data, the maximum size of which is expressed in bytes by the MTU size, data packets also contain other meta data such as the sender and recipient IP. The recommended MTU size is 1400, as this is internationally compatible with most mobile networks.
The smaller the MTU size, the more individual data packets files are divided into (fragmentation). As each data packet is also transmitted with, data consumption also increases if a smaller MTU size is configured.
