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Question 103 - PCNSE discussion

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While analyzing the Traffic log, you see that some entries show "unknown-tcp" in the Application column What best explains these occurrences?

A.
A handshake took place, but no data packets were sent prior to the timeout.
Answers
A.
A handshake took place, but no data packets were sent prior to the timeout.
B.
A handshake took place; however, there were not enough packets to identify the application.
Answers
B.
A handshake took place; however, there were not enough packets to identify the application.
C.
A handshake did take place, but the application could not be identified.
Answers
C.
A handshake did take place, but the application could not be identified.
D.
A handshake did not take place, and the application could not be identified.
Answers
D.
A handshake did not take place, and the application could not be identified.
Suggested answer: C

Explanation:

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClibCAC#:~:text=un known%2Dtcp%3A,firewall%20does%20not%20have%20signatures.Unknown-tcp means the firewall captured the three-way TCP handshake, but the application was not identified. This may be due to the use of a custom application for which the firewall does not have signatures

asked 23/09/2024
Ackim Sanuka
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