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Palo Alto Networks Certified Network Security Engineer (PCNSE) · Palo Alto Networks
Select 3 answers.
This question asks for 3 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
C. The TCP connection was terminated without identifying any application data: This statement is a high-level description of the outcome but is less precise as a root cause compared to the other correct options. It could describe the scenarios in both A (no data) and D (not enough data). Therefore, A and D are the more specific and distinct reasons for the failure.
B - a nonsense answer, makes my brain hurt :-D E - TCP session not established means NO session, and no application data as well. This leaves ACD as correct options..
App-ID labels the traffic as insufficient-data when not enough data is received in the payload to identify the application. In this case, the three-way TCP handshake completes, but not enough data follows the handshake to identify the traffic.