Nagios Xi Certified Administrator (Ncpa
– Legacy/Basic Admin Track) Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary function of Nagios XI?
A. Database management
B. Network monitoring and alerting
C. Web hosting
D. File transfer
Correct Answer: B. Network monitoring and alerting
Rationale: Nagios XI is designed to monitor systems, networks, and
infrastructure services and generate alerts for issues.
2. Which component executes plugins in Nagios XI?
A. NRPE daemon
B. Nagios Core engine
, C. Apache server
D. MySQL database
Correct Answer: B. Nagios Core engine
Rationale: The Nagios Core engine is responsible for running checks via
plugins and processing results.
3. What is the default web server used by Nagios XI?
A. Nginx
B. IIS
C. Apache
D. Tomcat
Correct Answer: C. Apache
Rationale: Nagios XI uses Apache HTTP Server as its default web interface
service.
4. Which protocol is commonly used by NRPE?
A. HTTP
B. SSH
C. SMTP
D. FTP
Correct Answer: B. SSH
Rationale: NRPE typically communicates securely using SSH or SSL-based
mechanisms.
, 5. What does NRPE stand for?
A. Nagios Remote Plugin Executor
B. Network Resource Processing Engine
C. Node Remote Performance Engine
D. Nagios Reporting Protocol Engine
Correct Answer: A. Nagios Remote Plugin Executor
Rationale: NRPE allows remote execution of plugins on monitored hosts.
6. Which file defines object configurations in Nagios XI?
A. httpd.conf
B. nagios.cfg
C. resolv.conf
D. hosts.ini
Correct Answer: B. nagios.cfg
Rationale: nagios.cfg is the main configuration file for defining monitoring
objects and settings.
7. What is the purpose of a Nagios plugin?
A. Store logs
B. Perform checks and return status
C. Update system packages
D. Manage users
, Correct Answer: B. Perform checks and return status
Rationale: Plugins execute checks and return OK, WARNING, CRITICAL, or
UNKNOWN states.
8. Which database is commonly used by Nagios XI?
A. Oracle
B. PostgreSQL
C. MySQL/MariaDB
D. SQLite
Correct Answer: C. MySQL/MariaDB
Rationale: Nagios XI stores configuration and performance data in
MySQL/MariaDB.
9. What is the default port for HTTP access in Nagios XI?
A. 21
B. 80
C. 443
D. 8080
Correct Answer: B. 80
Rationale: Apache serves Nagios XI web interface on port 80 by default (or
443 for SSL).
10. Which command restarts Nagios service on Linux?
A. systemctl restart nagios
– Legacy/Basic Admin Track) Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary function of Nagios XI?
A. Database management
B. Network monitoring and alerting
C. Web hosting
D. File transfer
Correct Answer: B. Network monitoring and alerting
Rationale: Nagios XI is designed to monitor systems, networks, and
infrastructure services and generate alerts for issues.
2. Which component executes plugins in Nagios XI?
A. NRPE daemon
B. Nagios Core engine
, C. Apache server
D. MySQL database
Correct Answer: B. Nagios Core engine
Rationale: The Nagios Core engine is responsible for running checks via
plugins and processing results.
3. What is the default web server used by Nagios XI?
A. Nginx
B. IIS
C. Apache
D. Tomcat
Correct Answer: C. Apache
Rationale: Nagios XI uses Apache HTTP Server as its default web interface
service.
4. Which protocol is commonly used by NRPE?
A. HTTP
B. SSH
C. SMTP
D. FTP
Correct Answer: B. SSH
Rationale: NRPE typically communicates securely using SSH or SSL-based
mechanisms.
, 5. What does NRPE stand for?
A. Nagios Remote Plugin Executor
B. Network Resource Processing Engine
C. Node Remote Performance Engine
D. Nagios Reporting Protocol Engine
Correct Answer: A. Nagios Remote Plugin Executor
Rationale: NRPE allows remote execution of plugins on monitored hosts.
6. Which file defines object configurations in Nagios XI?
A. httpd.conf
B. nagios.cfg
C. resolv.conf
D. hosts.ini
Correct Answer: B. nagios.cfg
Rationale: nagios.cfg is the main configuration file for defining monitoring
objects and settings.
7. What is the purpose of a Nagios plugin?
A. Store logs
B. Perform checks and return status
C. Update system packages
D. Manage users
, Correct Answer: B. Perform checks and return status
Rationale: Plugins execute checks and return OK, WARNING, CRITICAL, or
UNKNOWN states.
8. Which database is commonly used by Nagios XI?
A. Oracle
B. PostgreSQL
C. MySQL/MariaDB
D. SQLite
Correct Answer: C. MySQL/MariaDB
Rationale: Nagios XI stores configuration and performance data in
MySQL/MariaDB.
9. What is the default port for HTTP access in Nagios XI?
A. 21
B. 80
C. 443
D. 8080
Correct Answer: B. 80
Rationale: Apache serves Nagios XI web interface on port 80 by default (or
443 for SSL).
10. Which command restarts Nagios service on Linux?
A. systemctl restart nagios
