The PDU that is processed when a host computer is de-encapsulating a message at the transport layer of the tcp/ip model is segment.
Note that in the transport layer, a host computer is said to often de-encapsulate what we call a segment so that they can be able to put back data to an acceptable or given format through the use of the application layer protocol that belongs to the TCP/IP model.
Therefore, The PDU that is processed when a host computer is de-encapsulating a message at the transport layer of the tcp/ip model is segment as it is the right thing to do.
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