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  1. Home
  2. CompTIA Certification
  3. PT0-003 Exam
  4. CompTIA.PT0-003.v2026-01-26.q136 Dumps
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Question 131

A penetration tester is contracted to attack an oil rig network to look for vulnerabilities. While conducting the assessment, the support organization of the rig reported issues connecting to corporate applications and upstream services for data acquisitions. Which of the following is the MOST likely culprit?

Correct Answer: B
Successful exploits could cause network disruptions, service outages, or data corruption, which could affect the connectivity and functionality of the oil rig network. Patch installations, application failures, and bandwidth limitations are less likely to be related to the penetration testing activities.
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Question 132

During an engagement, a penetration tester needs to break the key for the Wi-Fi network that uses WPA2 encryption. Which of the following attacks would accomplish this objective?

Correct Answer: D
To break the key for a Wi-Fi network that uses WPA2 encryption, the penetration tester should use the KRACK (Key Reinstallation Attack) attack.
KRACK (Key Reinstallation Attack):
Definition: KRACK is a vulnerability in the WPA2 protocol that allows attackers to decrypt and potentially inject packets into a Wi-Fi network by manipulating and replaying cryptographic handshake messages.
Impact: This attack exploits flaws in the WPA2 handshake process, allowing an attacker to break the encryption and gain access to the network.
Other Attacks:
ChopChop: Targets WEP encryption, not WPA2.
Replay: Involves capturing and replaying packets to create effects such as duplicating transactions; it does not break WPA2 encryption.
Initialization Vector (IV): Related to weaknesses in WEP, not WPA2.
Pentest Reference:
Wireless Security: Understanding vulnerabilities in Wi-Fi encryption protocols, such as WPA2, and how they can be exploited.
KRACK Attack: A significant vulnerability in WPA2 that requires specific techniques to exploit.
By using the KRACK attack, the penetration tester can break WPA2 encryption and gain unauthorized access to the Wi-Fi network.
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Question 133

A penetration testing team wants to conduct DNS lookups for a set of targets provided by the client. The team crafts a Bash script for this task. However, they find a minor error in one line of the script:
1 #!/bin/bash
2 for i in $(cat example.txt); do
3 curl $i
4 done
Which of the following changes should the team make to line 3 of the script?

Correct Answer: D
Script Analysis:
Line 1: #!/bin/bash - This line specifies the script should be executed in the Bash shell.
Line 2: for i in $(cat example.txt); do - This line starts a loop that reads each line from the file example.txt and assigns it to the variable i.
Line 3: curl $i - This line attempts to fetch the content from the URL stored in i using curl. However, for DNS lookups, curl is inappropriate.
Line 4: done - This line ends the loop.
Error Identification:
The curl command is used for transferring data from or to a server, often used for HTTP requests, which is not suitable for DNS lookups.
Correct Command:
To perform DNS lookups, the host command should be used. The host command performs DNS lookups and displays information about the given domain.
Corrected Script:
Replace curl $i with host $i to perform DNS lookups on each target specified in example.txt.
Pentest References:
In penetration testing, DNS enumeration is a crucial step. It involves querying DNS servers to gather information about the target domain, which includes resolving domain names to IP addresses and vice versa.
Common tools for DNS enumeration include host, dig, and nslookup. The host command is particularly straightforward for simple DNS lookups.
By correcting the script to use host $i, the penetration testing team can effectively perform DNS lookups on the targets specified in example.txt.
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Question 134

An exploit developer is coding a script that submits a very large number of small requests to a web server until the server is compromised. The script must examine each response received and compare the data to a large number of strings to determine which data to submit next. Which of the following data structures should the exploit developer use to make the string comparison and determination as efficient as possible?

Correct Answer: C
data structures are used to store data in an organized form, and some data structures are more efficient and suitable for certain operations than others. For example, hash tables, skip lists and jump lists are some dictionary data structures that can insert and access elements efficiently3.
For string comparison, there are different algorithms that can measure how similar two strings are, such as Levenshtein distance, Hamming distance or Jaccard similarity4. Some of these algorithms can be implemented using data structures such as arrays or hashtables5.
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Question 135

A penetration tester is working on a scoping document with a new client. The methodology the client uses includes the following:
Pre-engagement interaction (scoping and ROE)
Intelligence gathering (reconnaissance)
Threat modeling
Vulnerability analysis
Exploitation and post exploitation
Reporting
Which of the following methodologies does the client use?

Correct Answer: B
Reference: https://kirkpatrickprice.com/blog/stages-of-penetration-testing-according-to-ptes/
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