This LFCS practice question tests your understanding of networking. 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.
Which tool is the recommended method for persistently configuring network interfaces in RHEL 8?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using nmcli commands
In RHEL 8, NetworkManager is the default networking daemon, and 'nmcli' is the recommended command-line tool for persistently configuring network interfaces. Unlike temporary 'ip' commands, nmcli writes configuration to NetworkManager connection profiles, ensuring changes survive reboots. Red Hat officially deprecates direct editing of ifcfg files in RHEL 8 and uses NetworkManager as the primary interface.
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.
✗
Using the 'ip' command with persistent flags
Why it's wrong here
The 'ip' command only changes runtime settings.
✓
Using nmcli commands
Why this is correct
NetworkManager with nmcli is the standard tool for persistent network configuration.
Related concept
Read the scenario before looking for a memorised answer.
This is deprecated in RHEL 8; NetworkManager may overwrite manual changes.
✗
Using systemd-networkd configuration files
Why it's wrong here
systemd-networkd is not the default network service in RHEL 8.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates familiar with older RHEL versions (6/7) may default to editing ifcfg files directly, not realizing that RHEL 8 deprecates this method and officially recommends nmcli for persistent configuration.
Trap categories for this question
Command / output trap
The 'ip' command only changes runtime settings.
Detailed technical explanation
How to think about this question
Under the hood, nmcli communicates with NetworkManager via D-Bus to create or modify connection profiles stored in /etc/NetworkManager/system-connections/. Each profile is an INI-style file with settings like 802-3-ethernet, ipv4, and ipv6 sections. In real-world scenarios, using nmcli ensures consistent configuration across RHEL 8, CentOS 8, and Fedora, and avoids issues when NetworkManager overwrites manually edited ifcfg files on service restart.
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 LFCS 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.
Networking — This question tests Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Using nmcli commands — In RHEL 8, NetworkManager is the default networking daemon, and 'nmcli' is the recommended command-line tool for persistently configuring network interfaces. Unlike temporary 'ip' commands, nmcli writes configuration to NetworkManager connection profiles, ensuring changes survive reboots. Red Hat officially deprecates direct editing of ifcfg files in RHEL 8 and uses NetworkManager as the primary interface.
What should I do if I get this LFCS 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 LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.
Question Discussion
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