LPIC-1 Linux Installation and Package Management Practice Question
This LPIC-1 practice question tests your understanding of linux installation and package management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
You work for a hosting company that manages hundreds of CentOS 7 servers. Each server runs a standard set of monitoring tools. Your team needs to deploy a custom monitoring agent that is only available as source code (tarball). The agent must be installed on all servers from a central repository. You have set up an internal YUM repository with the compiled RPMs of the agent. On a test server, you run 'yum install custom-agent', but it fails with a message that the package is not found. You verify the package is present in the repository directory and that the createrepo command has been run. Which step is most likely missing?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The repository is not being served via HTTP or FTP; it is only available as a local file path.
The repository metadata must be available via HTTP or FTP. Option B is the common cause: the repository is not served by a web server. Option A is irrelevant because repo files are independent of hostname. Option C is not needed if the repo is local to the server. Option D could be a secondary issue but the primary is serving.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The GPG key for the repository is not imported.
Why it's wrong here
GPG key issues usually give a specific error about missing key, not 'package not found'.
✗
The package architecture does not match (e.g., x86_64 package on i386).
Why it's wrong here
Architecture mismatch gives a different error.
✗
The .repo file references the wrong baseurl hostname.
Why it's wrong here
The hostname might be wrong, but the more fundamental issue is that the repository is probably not served via a web server.
✓
The repository is not being served via HTTP or FTP; it is only available as a local file path.
Why this is correct
YUM expects an HTTP/HTTPS/FTP URL unless using file:/// but baseurl often omitted.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Linux Installation and Package Management — This question tests Linux Installation and Package Management — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The repository is not being served via HTTP or FTP; it is only available as a local file path. — The repository metadata must be available via HTTP or FTP. Option B is the common cause: the repository is not served by a web server. Option A is irrelevant because repo files are independent of hostname. Option C is not needed if the repo is local to the server. Option D could be a secondary issue but the primary is serving.
What should I do if I get this LPIC-1 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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