Maximum transmission unit
lastmod 2025-12-16created 2017-01-118 edits
In computer networking, the maximum transmission unit (MTU) of a layer's communication protocol is the size (in bytes) of the largest protocol data unit that the layer can transmit. The MTU metric generally appears in connection with a communication interface (network card, serial port, etc.). The MTU size may be fixed by a standard (Ethernet) or decided by the system at connection time (in the case of point-to-point serial links).
UDP Hole Punching
The MTU value can have an effect. See UDP hole punching#Setting the MTU value.
See also
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