Question 302 of 516
TroubleshootmediumMultiple SelectObjective-mapped

PCNSE Troubleshoot Practice Question

This PCNSE practice question tests your understanding of troubleshoot. 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 are common causes of session drops after the initial handshake? (Choose two.)

Question 1mediummulti select
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Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

TCP sequence number mismatch due to packet reordering

Asymmetric routing and TCP sequence number mismatch are common causes of session drops after the handshake.

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.

  • TCP sequence number mismatch due to packet reordering

    Why this is correct

    Reordering can cause the firewall to drop packets as out-of-state.

    Related concept

    Read the scenario before looking for a memorised answer.

  • Firewall interface speed mismatch

    Why it's wrong here

    Speed mismatch would cause physical layer issues, not session drops.

  • Security policy change after session creation

    Why it's wrong here

    Policy changes apply to new sessions, not existing ones.

  • DNS resolution failure

    Why it's wrong here

    DNS failure occurs before session creation.

  • Asymmetric routing

    Why this is correct

    Return traffic taking different path causes session lookup failure.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • 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 PCNSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this PCNSE question test?

Troubleshoot — This question tests Troubleshoot — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: TCP sequence number mismatch due to packet reordering — Asymmetric routing and TCP sequence number mismatch are common causes of session drops after the handshake.

What should I do if I get this PCNSE question wrong?

Identify which PCNSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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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.