This LPIC-2 practice question tests your understanding of system security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 system administrator wants to verify the integrity of a downloaded package using a GPG signature. Which command should be used after importing the distributor's public key?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
gpg --encrypt package.tar.gz
Why wrong: Encryption is unrelated to signature verification.
gpg --verify package.tar.gz.asc package.tar.gz
This verifies the detached signature against the file.
gpg --decrypt package.tar.gz.asc
Why wrong: Decryption does not verify integrity or authenticity.
gpg --sign package.tar.gz
Why wrong: This would sign the file, not verify it.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
gpg --verify package.tar.gz.asc package.tar.gz
Option A is correct because 'gpg --verify' checks the signature against the public key. Option B is wrong because 'gpg --decrypt' decrypts, not verifies. Option C is wrong because 'gpg --sign' creates a signature. Option D is wrong because 'gpg --encrypt' encrypts data.
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
For each option: why learners choose it and why it is or isn't the right answer here.
gpg --encrypt package.tar.gz
Why it's wrong here
Encryption is unrelated to signature verification.
gpg --verify package.tar.gz.asc package.tar.gz
Why this is correct
This verifies the detached signature against the file.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
gpg --decrypt package.tar.gz.asc
Why it's wrong here
Decryption does not verify integrity or authenticity.
gpg --sign package.tar.gz
Why it's wrong here
This would sign the file, not verify it.
Common exam traps
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
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.
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
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
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-2 NAT questions on configuration and troubleshooting.
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FAQ
System Security — This question tests System Security — Static NAT maps one inside address to one outside address..
The correct answer is: gpg --verify package.tar.gz.asc package.tar.gz — Option A is correct because 'gpg --verify' checks the signature against the public key. Option B is wrong because 'gpg --decrypt' decrypts, not verifies. Option C is wrong because 'gpg --sign' creates a signature. Option D is wrong because 'gpg --encrypt' encrypts data.
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-2 NAT questions on configuration and troubleshooting.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
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