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user data (UD)

Userdata (UD) is data that is transferred by an application from a higher-level layer to the corresponding partner instance for transport. It is data that is exchanged between peer layers on behalf of the parent layers. User data is only exchanged in the state of data transfer, that is, when a connection exists between the corresponding layers.

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Englisch: user data - UD
Updated at: 04.12.2020
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