- A
Enables OS detection, version detection, script scanning, and traceroute.
Correct. -A is an aggregation flag that combines several scanning techniques to provide detailed information about the target's operating system, running services, and other characteristics.
- B
Sets the timing template to aggressive (level 4).
Why wrong: The timing template is set by -T4, not -A. -A does not affect timing; it is for detection features.
- C
Enables aggressive scanning that is more likely to be detected by the target.
Why wrong: While -A can generate more traffic, it is not primarily about aggressiveness. The timing template (-T4) controls how quickly packets are sent. -A focuses on the depth of information gathering.
- D
Performs a SYN (half-open) scan.
Why wrong: The SYN scan type is specified by -sS. -A is independent of the scan type and can be combined with various scan types.
Quick Answer
The answer is that the -A option enables OS detection, version detection, script scanning, and traceroute all at once. This is correct because -A is a composite flag in Nmap that bundles four distinct reconnaissance techniques into a single switch: -O for operating system detection, -sV for service version detection, -sC for default script scanning, and --traceroute for path analysis. On the CompTIA PenTest+ PT0-002 exam, this question tests your ability to interpret common Nmap aggressive scan options and understand how they streamline comprehensive scanning without needing separate flags. A common trap is confusing -A with just OS detection or thinking it only speeds up the scan, when in fact it activates multiple deep-inspection modules. For the exam, remember the mnemonic “All-in-One” for -A: it Aggregates OS, version, scripts, and traceroute into a single aggressive sweep.
PT0-002 Tools and Code Analysis Practice Question
This PT0-002 practice question tests your understanding of tools and code analysis. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: -A combines OS detection (-O) and version detection (-sV).. 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 penetration tester runs the following command: nmap -sS -p 1-65535 -T4 -A -O --reason target. What is the primary purpose of the -A option in this command?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
Enables OS detection, version detection, script scanning, and traceroute.
The -A option in nmap is a composite flag that enables OS detection (-O), version detection (-sV), script scanning (-sC), and traceroute (--traceroute) in a single switch. This is explicitly documented in nmap's man page and is designed to provide comprehensive reconnaissance in one command, making option A correct.
Key principle: -A combines OS detection (-O) and version detection (-sV).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enables OS detection, version detection, script scanning, and traceroute.
Why this is correct
Correct. -A is an aggregation flag that combines several scanning techniques to provide detailed information about the target's operating system, running services, and other characteristics.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
-A combines OS detection (-O) and version detection (-sV).
- ✗
Sets the timing template to aggressive (level 4).
Why it's wrong here
The timing template is set by -T4, not -A. -A does not affect timing; it is for detection features.
- ✗
Enables aggressive scanning that is more likely to be detected by the target.
Why it's wrong here
While -A can generate more traffic, it is not primarily about aggressiveness. The timing template (-T4) controls how quickly packets are sent. -A focuses on the depth of information gathering.
- ✗
Performs a SYN (half-open) scan.
Why it's wrong here
The SYN scan type is specified by -sS. -A is independent of the scan type and can be combined with various scan types.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the 'aggressive' label of -A with nmap's timing templates (e.g., -T4 or -T5), which are actually named 'aggressive' and 'insane' in the documentation, leading them to incorrectly associate -A with scan speed or detectability rather than its true composite functionality.
Detailed technical explanation
How to think about this question
Under the hood, -A triggers a sequence of operations: first, nmap performs OS fingerprinting by analyzing TCP/IP stack responses (e.g., TTL, window size, and DF bit), then runs version detection by connecting to open ports and parsing service banners, followed by executing default NSE scripts (e.g., http-title, smb-os-discovery), and finally performs a traceroute using ICMP or TCP probes. A real-world scenario where this matters is during internal penetration tests where -A can inadvertently cause service disruption or trigger IDS alerts due to the volume of probes, so testers often use -A only after initial stealthy scans.
KKey Concepts to Remember
- -A combines OS detection (-O) and version detection (-sV).
- -A includes script scanning (--script=default).
- -A also performs a traceroute (--traceroute).
- -A is an 'Aggressive scan' flag, but 'aggressive' refers to the depth of information, not just speed.
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
-A combines OS detection (-O) and version detection (-sV).
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
What to study next
Got this wrong? Here's your next step.
Review -A combines OS detection (-O) and version detection (-sV)., then practise related PT0-002 questions on the same topic to reinforce the concept.
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Tools and Code Analysis — study guide chapter
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FAQ
Questions learners often ask
What does this PT0-002 question test?
Tools and Code Analysis — This question tests Tools and Code Analysis — -A combines OS detection (-O) and version detection (-sV)..
What is the correct answer to this question?
The correct answer is: Enables OS detection, version detection, script scanning, and traceroute. — The -A option in nmap is a composite flag that enables OS detection (-O), version detection (-sV), script scanning (-sC), and traceroute (--traceroute) in a single switch. This is explicitly documented in nmap's man page and is designed to provide comprehensive reconnaissance in one command, making option A correct.
What should I do if I get this PT0-002 question wrong?
Review -A combines OS detection (-O) and version detection (-sV)., then practise related PT0-002 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
-A combines OS detection (-O) and version detection (-sV).
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Last reviewed: Jun 11, 2026
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