LPIC-2 Network Client Management Practice Question
Exhibit
Refer to the exhibit. Exhibit: ``` # /etc/ldap.conf base dc=example,dc=com uri ldap://ldap.example.com ldap_version 3 pam_filter objectclass=posixAccount pam_password md5 nss_base_passwd dc=example,dc=com nss_base_shadow dc=example,dc=com nss_base_group dc=example,dc=com ```
Given the LDAP client configuration shown in the exhibit, which THREE additional components are required for LDAP authentication to work? (Choose three.)
⚠ Common exam trap
It's easy for candidates to confuse optional components like autofs or Kerberos as mandatory for LDAP authentication, when in fact only NSS, PAM, and caching (nscd) are the core required pieces for basic LDAP authentication to function.
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
✓
Edit /etc/nsswitch.conf to include ldap in passwd, shadow, and group lines.
/etc/nsswitch.conf controls which sources the system uses for user, group, and password lookups. Adding 'ldap' to the passwd, shadow, and group lines directs the Name Service Switch (NSS) to query the LDAP directory for authentication-related information, which is essential for integrating LDAP as an identity source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Edit /etc/nsswitch.conf to include ldap in passwd, shadow, and group lines.
Why this is correct
Necessary to query LDAP for user/group info.
- ✗
Install and configure autofs.
Why it's wrong here
Not related to LDAP authentication.
- ✗
Configure /etc/krb5.conf for Kerberos.
Why it's wrong here
Not required for basic LDAP authentication.
- ✓
Add 'auth sufficient pam_ldap.so' or similar to /etc/pam.d/system-auth.
Why this is correct
LDAP PAM module handles authentication.
- ✓
Start the nscd service.
Why this is correct
Caches user/group information for performance.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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