LPIC-2 Network Client Management Practice Question
This LPIC-2 practice question tests your understanding of network client 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.
An LDAP client fails to authenticate users against an LDAP server. The /etc/nsswitch.conf includes 'passwd: files ldap' and the /etc/pam.d/system-auth has appropriate pam_ldap.so entries. However, 'getent passwd' shows only local users. Which command should the administrator run first to diagnose the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Run 'ldapsearch -x -H ldap://server -b dc=example,dc=com' to test connectivity.
Option B is correct because the first step in diagnosing an LDAP authentication failure is to verify basic connectivity to the LDAP server. Running 'ldapsearch -x -H ldap://server -b dc=example,dc=com' tests whether the client can reach the server and perform a simple anonymous search. If this fails, no amount of configuration tweaking will resolve the issue, as the root cause is likely network or server availability.
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.
✗
View the contents of /etc/nsswitch.conf.
Why it's wrong here
Only confirms order, not actual connectivity.
✓
Run 'ldapsearch -x -H ldap://server -b dc=example,dc=com' to test connectivity.
Why this is correct
Directly tests if client can bind to LDAP server.
Clue confirmation
The clue words "first", "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Restart the nslcd service.
Why it's wrong here
Doesn't diagnose why LDAP is not working; just restarts the service.
✗
Check the syntax of /etc/ldap.conf with 'slaptest -f /etc/ldap.conf'.
Why it's wrong here
That command is for OpenLDAP server configuration, not client.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often jump to restarting services or checking configuration files, but the LPIC-2 exam emphasizes a systematic troubleshooting approach where connectivity testing (ldapsearch) is the first logical step before assuming configuration or service issues.
Trap categories for this question
Command / output trap
That command is for OpenLDAP server configuration, not client.
Detailed technical explanation
How to think about this question
Under the hood, the nss_ldap or nss-pam-ldapd module uses nslcd to perform LDAP queries; if nslcd cannot connect to the server, it returns no results, causing 'getent passwd' to show only local users. The ldapsearch command directly tests the LDAP protocol (RFC 4511) and can reveal issues like firewall blocks, DNS resolution failures, or incorrect server URIs, which are common in real-world scenarios where LDAP servers are on different subnets or use TLS.
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 LPIC-2 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.
Network Client Management — This question tests Network Client Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Run 'ldapsearch -x -H ldap://server -b dc=example,dc=com' to test connectivity. — Option B is correct because the first step in diagnosing an LDAP authentication failure is to verify basic connectivity to the LDAP server. Running 'ldapsearch -x -H ldap://server -b dc=example,dc=com' tests whether the client can reach the server and perform a simple anonymous search. If this fails, no amount of configuration tweaking will resolve the issue, as the root cause is likely network or server availability.
What should I do if I get this LPIC-2 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first", "which command". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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