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A penetration tester is reviewing a Python script that automates a common network attack. The script imports the 'ftplib' and 'telnetlib' libraries. It reads a list of IP addresses from a file and, for each host, attempts to connect using a predefined username and password. If the connection succeeds, it logs the success. Which attack is the script most likely performing?

Question 1easymultiple choice
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A penetration tester is reviewing a Python script that automates a common network attack. The script imports the 'ftplib' and 'telnetlib' libraries. It reads a list of IP addresses from a file and, for each host, attempts to connect using a predefined username and password. If the connection succeeds, it logs the success. Which attack is the script most likely performing?

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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

Best answer

Brute-force attack against FTP and Telnet services

The script uses FTP and Telnet libraries to attempt connections with a known username and password, which is a brute-force attack against those services.

B

Distractor review

Vulnerability scanning for open ports

A vulnerability scanner would check for known vulnerabilities, not attempt to authenticate with a single credential pair.

C

Distractor review

Password spraying attack against web applications

Password spraying typically targets web login forms, not FTP or Telnet protocols. The libraries used are specific to FTP and Telnet.

D

Distractor review

Service enumeration using banner grabbing

Service enumeration would involve connecting and reading banners without authentication attempts; this script attempts to log in.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Related practice questions

Related PT0-002 practice-question pages

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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?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Brute-force attack against FTP and Telnet services — The use of 'ftplib' (FTP) and 'telnetlib' (Telnet) indicates the script is testing for weak credentials on clear-text protocols. Both FTP and Telnet are legacy protocols that transmit credentials in plaintext, making them common targets for brute-force attacks. The script tries a single credential combination against multiple hosts, which is a horizontal brute-force attack. It is not a vulnerability scan (which would check for CVEs), not a password spraying attack on web services (which uses different protocols), and not a service enumeration (which would not attempt authentication).

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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