The correct tool is wpa_supplicant, used with a configuration file containing the PSK. This is because WPA2-PSK authentication relies on the wpa_supplicant daemon to handle the critical 4-way handshake and key derivation, ensuring the wireless interface wlan0 securely associates with the network. On the LPIC-2 exam, this scenario tests your understanding of Linux wireless networking configuration, specifically that wpa_supplicant—not NetworkManager or iwconfig—is the standard tool for managing WPA2-PSK when a static IP is also required. A common trap is assuming a tool like iw or ifconfig can handle the authentication layer; they cannot, as they only manage link-level or IP settings. To remember: think of wpa_supplicant as the “handshake handler” for the PSK, while static IP assignment is a separate step via ip or netplan. A useful mnemonic is “WPA2 needs a PSK, and wpa_supplicant does the key work.”
LPIC-2 Advanced Networking Configuration Practice Question
This LPIC-2 practice question tests your understanding of advanced networking configuration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An administrator needs to configure a wireless interface wlan0 with WPA2-PSK authentication and a static IP address 192.168.2.50/24. Which tool should be used to configure the wireless settings?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
wpa_supplicant with a configuration file containing the PSK
WPA2-PSK authentication requires the wpa_supplicant daemon, which handles the 4-way handshake and key derivation. A configuration file with the PSK (pre-shared key) is the standard method to define the network SSID and passphrase, allowing wpa_supplicant to manage the wireless association securely.
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.
✗
NetworkManager with nmcli
Why it's wrong here
nmcli can be used but the question asks for a tool specifically for wireless settings; wpa_supplicant is more direct.
✓
wpa_supplicant with a configuration file containing the PSK
ifconfig wlan0 up and route add default gw 192.168.2.1
Why it's wrong here
This sets IP but not wireless security.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse iwconfig's key parameter (which only works for WEP) with WPA2-PSK, or assume a higher-level tool like nmcli is the direct configuration tool, when the exam expects the low-level WPA2-PSK daemon wpa_supplicant.
Detailed technical explanation
How to think about this question
wpa_supplicant uses a configuration file (e.g., /etc/wpa_supplicant/wpa_supplicant.conf) with a network block containing ssid and psk (either plaintext or hashed via wpa_passphrase). The daemon then performs a 4-way handshake with the access point using the derived pairwise transient key (PTK) from the PSK and nonces. In real-world scenarios, administrators often combine wpa_supplicant with a static IP via a separate tool like ip or ifconfig, but the wireless security itself is solely wpa_supplicant's responsibility.
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.
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
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 LPIC-2 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Advanced Networking Configuration — This question tests Advanced Networking Configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: wpa_supplicant with a configuration file containing the PSK — WPA2-PSK authentication requires the wpa_supplicant daemon, which handles the 4-way handshake and key derivation. A configuration file with the PSK (pre-shared key) is the standard method to define the network SSID and passphrase, allowing wpa_supplicant to manage the wireless association securely.
What should I do if I get this LPIC-2 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This LPIC-2 practice question is part of Courseiva's free LPI 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 LPIC-2 exam.
Question Discussion
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