Question 832 of 1,000
Security MonitoringhardMultiple ChoiceObjective-mapped

200-201 Security Monitoring Practice Question

This 200-201 practice question tests your understanding of security monitoring. 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.

A security analyst is reviewing Zeek connection logs and sees the following entry: '192.168.1.10:12345 > 10.0.0.1:80 (tcp) duration 0.001 sec, service http, bytes 60, state S0'. Based on the state 'S0', what does this indicate about the connection?

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

A SYN packet was sent but no reply was received.

In Zeek, S0 indicates that a SYN packet was sent but no SYN-ACK was received (connection attempt without completion). This could be part of a port scan or a half-open connection.

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.

  • Data was transferred successfully and the connection closed normally.

    Why it's wrong here

    That would be state SF (normal close).

  • A SYN packet was sent but no reply was received.

    Why this is correct

    S0 specifically indicates a 'SYN seen, no reply' state, typical of half-open scanning.

    Related concept

    Read the scenario before looking for a memorised answer.

  • The connection was established successfully.

    Why it's wrong here

    Established connections would have a state like SF (normal close) or OTH (other).

  • The connection was reset by the remote host.

    Why it's wrong here

    Reset connections show state 'RST'.

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.

Trap categories for this question

  • Command / output trap

    Reset connections show state 'RST'.

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 200-201 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.

Visual reference

Client Server SYN (seq=100) SYN-ACK (seq=200, ack=101) ACK (ack=201) Connection established — data transfer begins

What to study next

Got this wrong? Here's your next step.

Identify which 200-201 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.

Related practice questions

Related 200-201 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

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FAQ

Questions learners often ask

What does this 200-201 question test?

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

What is the correct answer to this question?

The correct answer is: A SYN packet was sent but no reply was received. — In Zeek, S0 indicates that a SYN packet was sent but no SYN-ACK was received (connection attempt without completion). This could be part of a port scan or a half-open connection.

What should I do if I get this 200-201 question wrong?

Identify which 200-201 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: Jul 4, 2026

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This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.