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.
A systemd-networkd managed interface enp1s0 needs to be configured with a static IP address 192.168.1.100/24 and a default gateway via 192.168.1.1. Which .network file configuration is correct?
Option C is correct because systemd-networkd uses the `[Match]` section with `Name=` to match the interface, and the `[Network]` section with `Address=` to assign a static IP address and `Gateway=` to set the default gateway. The syntax `Address=192.168.1.100/24` is the proper directive for defining a static IP address in a .network file, and `Gateway=192.168.1.1` correctly specifies the default gateway.
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.
'DefaultGateway' is not a valid key; use 'Gateway'.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the `[Match]` section key `Name=` with `Interface=` (which is used in other tools like ifcfg files) and mistakenly use `DefaultGateway=` (a valid directive in some network configuration systems like Netplan) instead of the correct `Gateway=` in systemd-networkd.
Detailed technical explanation
How to think about this question
systemd-networkd reads .network files from /etc/systemd/network/ and matches them to interfaces based on the `[Match]` section, which can use `Name=`, `MACAddress=`, or other properties. The `Address=` directive supports CIDR notation and can be specified multiple times for multiple IP addresses, while `Gateway=` sets the default route; for IPv6, `Gateway=_ipv6_address_` works similarly. A common real-world scenario is configuring a static IP on a server where DHCP is not available, and using `systemctl restart systemd-networkd` to apply changes without a reboot.
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: [Match]
Name=enp1s0
[Network]
Address=192.168.1.100/24
Gateway=192.168.1.1 — Option C is correct because systemd-networkd uses the `[Match]` section with `Name=` to match the interface, and the `[Network]` section with `Address=` to assign a static IP address and `Gateway=` to set the default gateway. The syntax `Address=192.168.1.100/24` is the proper directive for defining a static IP address in a .network file, and `Gateway=192.168.1.1` correctly specifies the default gateway.
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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Question Discussion
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