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NSE 4 · Certificates and encrypted traffic

Practice question 223 of 440 · medium

Blocking UDP QUIC does not restore access for one client. What is the best interpretation?

Choose the single best answer.

  1. A.The application must have bypassed all routing
  2. B.Deep inspection can never work for TCP HTTPS
  3. C.TCP fallback is not guaranteed by blocking QUIC
  4. D.FortiGate guarantees fallback only with source NAT
Show the answer and explanation

✓ Correct answer

  • TCP fallback is not guaranteed by blocking QUIC

Fallback depends on client support and behavior. NAT cannot guarantee it; failure does not establish a routing bypass or rule out TCP inspection.

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Unofficial study material, independently created and unaffiliated with Fortinet. Questions are original practice items, not recalled exam content. Published-topic coverage does not guarantee examination success. FortiOS baseline is 7.6.0; independently versioned FortiSASE and CNF references are qualified where relevant.