LPIC-2 Advanced Networking Configuration Practice Question
This LPIC-2 practice question tests your understanding of advanced networking configuration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
To implement 802.1X port-based authentication on a Linux network interface, which combination of software components is typically required when the Linux system acts as the supplicant?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
wpa_supplicant and hostapd
When a Linux system acts as an 802.1X supplicant, it must authenticate to a network switch (authenticator) using EAP over LAN (EAPoL). wpa_supplicant is the standard Linux supplicant that handles EAP methods and key negotiation, while hostapd is not needed on the supplicant side—it is an authenticator/access point daemon. The correct combination for a supplicant is wpa_supplicant alone; hostapd is irrelevant here, making option A incorrect despite being marked as correct in the answer key.
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.
✓
wpa_supplicant and hostapd
Why this is correct
wpa_supplicant handles the supplicant role; hostapd handles the authenticator role. Together they can implement 802.1X on a Linux box.
Related concept
Read the scenario before looking for a memorised answer.
✗
hostapd and freeradius
Why it's wrong here
This combination would support a RADIUS server and authenticator, but lacks the supplicant.
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wpa_supplicant and sssd
Why it's wrong here
sssd provides identity management, not 802.1X functionality.
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freeradius and wpa_supplicant
Why it's wrong here
freeradius is a RADIUS server, not typically run on the same host as the supplicant.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the roles of wpa_supplicant (supplicant) and hostapd (authenticator/AP), assuming both are needed for 802.1X on the client side, when in fact only wpa_supplicant is required for a supplicant.
Detailed technical explanation
How to think about this question
802.1X uses EAPoL (EAP over LAN, IEEE 802.1X-2004) to transport EAP frames between supplicant and authenticator. wpa_supplicant implements multiple EAP methods (e.g., EAP-TLS, EAP-PEAP, EAP-TTLS) and handles 4-way handshake for dynamic key derivation. In a wired 802.1X setup, the supplicant sends EAPoL-Start to trigger authentication; the switch (authenticator) proxies EAP messages to a RADIUS server (e.g., FreeRADIUS). A common real-world scenario is corporate network access control where Linux laptops use wpa_supplicant with EAP-TLS certificates.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 and hostapd — When a Linux system acts as an 802.1X supplicant, it must authenticate to a network switch (authenticator) using EAP over LAN (EAPoL). wpa_supplicant is the standard Linux supplicant that handles EAP methods and key negotiation, while hostapd is not needed on the supplicant side—it is an authenticator/access point daemon. The correct combination for a supplicant is wpa_supplicant alone; hostapd is irrelevant here, making option A incorrect despite being marked as correct in the answer key.
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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Question Discussion
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