PCNSE Decryption and SSL Inspection Practice Question
This PCNSE practice question tests your understanding of decryption and ssl inspection. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements are true about TLS version 1.3 support in Palo Alto Networks decryption?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
TLS 1.3 decryption is supported in PAN-OS 9.0 and later.
Option B is correct because TLS 1.3 decryption support was introduced in PAN-OS 9.0, enabling the firewall to decrypt and inspect TLS 1.3 traffic. This allows organizations to maintain visibility into encrypted traffic using the latest TLS protocol without requiring additional hardware or software upgrades beyond the PAN-OS version.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
TLS 1.3 decryption uses the same proxy ciphers as TLS 1.2.
Why it's wrong here
TLS 1.3 uses completely different cipher suites and key exchange mechanisms.
✓
TLS 1.3 decryption is supported in PAN-OS 9.0 and later.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume TLS 1.3 decryption requires the same proxy ciphers as TLS 1.2 or is limited to inbound inspection, but Palo Alto Networks explicitly supports both forward proxy and inbound inspection with distinct cipher suite handling starting in PAN-OS 9.0.
Detailed technical explanation
How to think about this question
Under the hood, TLS 1.3 decryption in PAN-OS leverages the firewall's ability to perform a man-in-the-middle (MITM) proxy by generating ephemeral keys for each session, using the supported groups (e.g., x25519, secp256r1) and cipher suites defined in RFC 8446. A subtle behavior is that TLS 1.3's 0-RTT (early data) feature is not decrypted by the firewall, as the data is sent before the handshake completes; this can cause gaps in inspection for applications using 0-RTT. In a real-world scenario, an organization upgrading to PAN-OS 9.0+ can decrypt TLS 1.3 traffic from modern browsers and clients, but must ensure decryption policies exclude 0-RTT sessions to avoid inspection failures.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the PCNSE exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Decryption and SSL Inspection — This question tests Decryption and SSL Inspection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: TLS 1.3 decryption is supported in PAN-OS 9.0 and later. — Option B is correct because TLS 1.3 decryption support was introduced in PAN-OS 9.0, enabling the firewall to decrypt and inspect TLS 1.3 traffic. This allows organizations to maintain visibility into encrypted traffic using the latest TLS protocol without requiring additional hardware or software upgrades beyond the PAN-OS version.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.
Question Discussion
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