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Exam NSE8 topic 1 question 9 discussion

Actual exam question from Fortinet's NSE8
Question #: 9
Topic #: 1
[All NSE8 Questions]

Referring to the exhibit, which statement is true?

  • A. The packet failed the HMAC validation.
  • B. The packet did not match any of the local IPsec SAs.
  • C. The packet was protected with an unsupported encryption algorithm.
  • D. The IPsec negotiation failed because the SPI was unknown.
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Suggested Answer: A 🗳️
http://kb.fortinet.com/kb/viewContent.do?externalId=FD33101
by Frgaa at Nov. 4, 2022, 7:32 a.m.

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yadavarya97
2 years, 2 months ago
Answer should be B. as it did not match local established IPsec SA
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Frgaa
2 years, 6 months ago
Selected Answer: B
There may be various reasons for why the FortiGate will generate a log message regarding an unknown SPI, but ultimately the root issue is that the FortiGate received an ESP packet whose SPI does not match to any currently-active IPsec tunnel
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