Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A penetration tester wants to quickly identify the listening services on a target Linux server without performing a full port scan. The tester has obtained an unauthenticated shell as a low-privileged user. Which built-in command is most likely available on a modern Linux distribution to list all listening TCP sockets?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
netstat -tlnp
netstat is not always installed by default on modern distributions, and the -p flag may require root to show process names.
B
Best answer
ss -tlnp
ss is part of iproute2 and is commonly pre-installed; -t shows TCP, -l listening, -n numeric, -p shows process (if permitted).
C
Distractor review
lsof -i
lsof may require root to list all processes, and it is not specifically designed for listening sockets only.
D
Distractor review
ifconfig -a
ifconfig displays network interface configuration, not socket information.
Common exam trap
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Technical deep dive
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Related practice questions
Related PT0-002 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A penetration tester is writing the executive summary for a report. The client's CEO needs to understand the business impact of a critical SQL injection vulnerability. Which of the following should the tester include?
Question 2
A penetration tester has gained a low-privileged shell on a Linux server. During enumeration, the tester discovers a binary with the SUID bit set that belongs to root and is known to have a buffer overflow vulnerability. What is the MOST effective next step to escalate privileges?
Question 3
A penetration tester is performing passive reconnaissance against a target domain. Which of the following resources can be used to gather information about the target without directly sending packets to the target's network? (Select two.) (Choose 2.)
Question 4
A penetration tester has obtained a TGT from a domain controller by cracking the krbtgt hash. Which attack can the tester now perform to gain persistent administrative access to any resource in the domain?
Question 5
A penetration tester is writing the executive summary for the final report. The CEO needs to understand the overall risk level and the business impact of the findings. Which of the following should be included in the executive summary?
Question 6
A penetration tester is writing the executive summary of a penetration test report. Which of the following elements is MOST important to include for a non-technical audience?
FAQ
Questions learners often ask
What does this PT0-002 question test?
Authentication checks who the user is.
What is the correct answer to this question?
The correct answer is: ss -tlnp — The 'ss' command (socket statistics) is part of the iproute2 package, which is typically installed by default on modern Linux distributions. It can list listening TCP sockets without root privileges (though process names may require root). 'netstat' is older and may not be installed. 'lsof' often requires root to see all processes, and 'ifconfig' does not show sockets.
What should I do if I get this PT0-002 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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