A session in the Traffic log is reporting the application as “incomplete.” What does “incomplete” mean?

A session in the Traffic log is reporting the application as “incomplete.” What does “incomplete” mean?
A . The three-way TCP handshake was observed, but the application could not be identified.
B . The three-way TCP handshake did not complete.
C . The traffic is coming across UDP, and the application could not be identified.
D . Data was received but was instantly discarded because of a Deny policy was applied before App-ID could be applied.

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Answer: B