LPIC-2 Network Client Management Practice Question
This LPIC-2 practice question tests your understanding of network client management. 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 wants to ensure that a Linux client sends all DNS queries to a specific DNS server without relying on DHCP-provided DNS servers. Which configuration files should be modified?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Edit /etc/dhcp/dhclient.conf to add 'supersede domain-name-servers <desired IP>;'
Option B is correct because the dhclient.conf file allows an administrator to override DHCP-provided DNS servers using the 'supersede' directive. This forces the DHCP client to ignore the DNS servers received from the DHCP server and instead use the manually specified DNS server when writing /etc/resolv.conf. This is a standard method for controlling DNS resolution on systems using dhclient.
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.
✗
Configure NetworkManager to ignore DNS from DHCP and set the DNS manually in the connection profile
Why it's wrong here
This works if NetworkManager is used, but the question does not specify NetworkManager; dhclient.conf is a more direct method.
✓
Edit /etc/dhcp/dhclient.conf to add 'supersede domain-name-servers <desired IP>;'
Why this is correct
This overrides DHCP-provided DNS servers and ensures the client uses the specified DNS.
Related concept
Read the scenario before looking for a memorised answer.
✗
Edit /etc/sysconfig/network-scripts/ifcfg-eth0 and set PEERDNS=no and DNS1=<desired IP>
Why it's wrong here
This is distribution-specific and may not work if the DHCP client is not configured to respect those settings.
✗
Edit /etc/resolv.conf and set the nameserver to the desired IP
Why it's wrong here
The DHCP client may overwrite resolv.conf upon lease renewal.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume editing /etc/resolv.conf directly is sufficient, but they fail to recognize that DHCP clients or network management tools will overwrite it, making the change non-persistent unless the DHCP client is explicitly configured to ignore or supersede the provided DNS servers.
Detailed technical explanation
How to think about this question
The 'supersede' directive in dhclient.conf is part of the ISC DHCP client's configuration and uses the DHCP option code for domain-name-servers (option 6). When dhclient processes a lease, it applies 'supersede' statements before writing resolv.conf, effectively overriding any DNS servers offered by the DHCP server. In real-world scenarios, this is useful for enforcing corporate DNS policies or using a local caching resolver like dnsmasq or unbound.
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.
Network Client Management — This question tests Network Client Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Edit /etc/dhcp/dhclient.conf to add 'supersede domain-name-servers <desired IP>;' — Option B is correct because the dhclient.conf file allows an administrator to override DHCP-provided DNS servers using the 'supersede' directive. This forces the DHCP client to ignore the DNS servers received from the DHCP server and instead use the manually specified DNS server when writing /etc/resolv.conf. This is a standard method for controlling DNS resolution on systems using dhclient.
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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