LFCS Service Configuration Practice Question
A custom service requires that the network is fully operational before it starts. Which directive should be added to the [Unit] section of the service's unit file to ensure this dependency?
⚠ Common exam trap
Many candidates confuse `network.target` (which is reached early and does not guarantee network readiness) with `network-online.target` (which waits for full network availability), leading them to pick option D or B incorrectly.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
After=network-online.target
`After=network-online.target` ensures the service starts only after the network is fully operational, including IP address assignment and connectivity. This target is reached when network managers like systemd-networkd or NetworkManager confirm the network is online, making it suitable for services that require active network interfaces.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
After=network-online.target
Why this is correct
Ensures service starts after network is fully up.
- ✗
Requires=network.target
Why it's wrong here
Ensures network.target is started, but not fully ready.
- ✗
Wants=network-online.target
Why it's wrong here
Weak dependency, does not enforce ordering.
- ✗
After=network.target
Why it's wrong here
Orders after network.target, but network may not be fully operational.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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