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Essential System Services and Networking practice questions

Practise Linux Professional Institute Certification Level 1 LPIC-1 Essential System Services and Networking practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: Essential System Services and Networking
Practice 10 questionsBrowse domain →

What the exam tests

What to know about Essential System Services and Networking

Essential System Services and Networking questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Essential System Services and Networking exam traps

  • ▸Answering from memory before reading the full scenario.
  • ▸Missing a constraint such as cost, availability, security, scope or command context.
  • ▸Choosing a broad answer when the question asks for the most specific fix.
  • ▸Ignoring why the wrong options are tempting.

Practice set

Essential System Services and Networking questions

20 questions · select your answer, then reveal the explanation

Question 1hardmultiple choice
Read the full Essential System Services and Networking explanation →

A system administrator notices that the NTP service on a Linux server is not synchronizing time with external NTP servers. The administrator runs 'ntpq -p' and sees that all servers listed have a 'reach' value of 0. Which of the following is the most likely cause?

Question 2mediummultiple choice
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A web server running Apache on Linux is experiencing slow response times. The administrator runs 'netstat -tuln' and sees many connections in TIME_WAIT state. Which of the following is the best course of action to improve performance?

Question 3easymultiple choice
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Which of the following commands will display the default gateway of a Linux system?

Question 4hardmultiple choice
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A database server on a Linux system is configured to listen on TCP port 3306. The administrator wants to restrict access to the database server to only the local network (192.168.1.0/24) using iptables. Which of the following iptables rules achieves this?

Question 5easymultiple choice
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A user reports that they cannot connect to a remote server using SSH. The administrator checks the SSH server status and it is running. Which of the following is the most likely cause?

Question 6mediummultiple choice
Review the full routing breakdown →

A system administrator is configuring a Linux server to act as a router. The server has two network interfaces: eth0 (192.168.1.1/24) and eth1 (10.0.0.1/24). Which of the following commands enables IP forwarding on this server?

Question 7hardmultiple choice
Read the full DNS explanation →

An administrator is troubleshooting a DNS issue. The command 'dig @8.8.8.8 example.com' returns a response, but 'host example.com' returns 'Host not found'. Which of the following is the most likely cause?

Question 8mediummulti select
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Which TWO of the following are valid methods to configure network interfaces on a Linux system? (Choose two.)

Question 9hardmulti select
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Which THREE of the following are true regarding the use of systemd-networkd for network configuration? (Choose three.)

Question 10easymultiple choice
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Refer to the exhibit. The administrator wants to ensure that SSH service starts automatically after a system reboot. Based on the output, what is the current status of this setting?

Exhibit

Refer to the exhibit.

Output of 'systemctl status sshd':

sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2023-01-10 14:23:45 UTC; 2h 15min ago
   Main PID: 1234 (sshd)
   Tasks: 1 (limit: 512)
   Memory: 4.2M
   CGroup: /system.slice/sshd.service
           └─1234 /usr/sbin/sshd -D
Question 11mediummultiple choice
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Refer to the exhibit. The system has two network interfaces: eth0 and eth1. Which interface will be used to reach a host at IP address 10.10.10.10?

Exhibit

Refer to the exhibit.

Output of 'ip route show':

default via 192.168.1.1 dev eth0 proto static metric 100
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.10 metric 100
10.0.0.0/8 via 10.0.0.1 dev eth1 proto static metric 200
Question 12hardmultiple choice
Review the full routing breakdown →

A company runs a critical web application on a Linux server (Ubuntu 20.04) with Apache and MySQL. The server has two network interfaces: eth0 (public IP) and eth1 (private IP). Recently, the application has been experiencing intermittent connectivity issues. Users report that the web page sometimes loads slowly or times out. The administrator checks the network configuration and finds the following: eth0 is configured with a static IP 203.0.113.10/24, gateway 203.0.113.1; eth1 is configured with a static IP 10.0.0.10/24, no gateway. The administrator runs 'ip route show' and sees: default via 203.0.113.1 dev eth0, 10.0.0.0/24 dev eth1 proto kernel scope link src 10.0.0.10 metric 100. The administrator also notices that the system's /etc/resolv.conf contains nameserver 8.8.8.8 and nameserver 8.8.4.4. The MySQL server is configured to listen on 127.0.0.1. What is the most likely cause of the intermittent connectivity issues?

Question 13mediummulti select
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Which THREE of the following are valid files or directories used by the Domain Name System (DNS) resolution process on a Linux system?

Question 14hardmultiple choice
Read the full DHCP explanation →

An administrator reviews the above DHCP server logs. Based on the output, which statement is correct about the DHCP transaction?

Exhibit

Refer to the exhibit.

$ cat /var/log/messages | grep -i "dhcp" | tail -5
Nov 12 08:22:15 server dhcpd: DHCPDISCOVER from 00:1a:2b:3c:4d:5e via eth0
Nov 12 08:22:15 server dhcpd: DHCPOFFER on 192.168.1.100 to 00:1a:2b:3c:4d:5e via eth0
Nov 12 08:22:18 server dhcpd: DHCPREQUEST for 192.168.1.100 (192.168.1.1) from 00:1a:2b:3c:4d:5e via eth0
Nov 12 08:22:18 server dhcpd: DHCPACK on 192.168.1.100 to 00:1a:2b:3c:4d:5e via eth0
Nov 12 08:22:20 server dhcpd: DHCPINFORM from 192.168.1.100 via eth0
Question 15easymultiple choice
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A junior system administrator is tasked with setting up a new Linux server that will act as a network time client. The server must synchronize its clock with the external NTP pool servers 0.pool.ntp.org, 1.pool.ntp.org, and 2.pool.ntp.org. The administrator installs the ntp package and edits /etc/ntp.conf to include the following lines:

server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org

However, after restarting the ntpd service, the administrator notices that the system time does not appear to be synchronized. The command 'ntpq -p' returns no output. The administrator checks the status of the ntpd service with 'systemctl status ntp' and sees that the service is active (running). What is the most likely reason for the synchronization failure?

Question 16mediumdrag order
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Order the steps to mount an NFS share from a remote server.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order
1Step 1
2Step 2
3Step 3
4Step 4
5Step 5
Question 17mediummatching
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Match each Linux command to its primary function.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts
Matches

Search text using patterns

Change file permissions

Report snapshot of current processes

Archive files

Stream editor for filtering and transforming text

Question 18easymultiple choice
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A user reports that they cannot access the company's web server. The administrator confirms the server is running and network connectivity is fine. Which command should be used to verify that the HTTP service is listening on the correct port?

Question 19easymultiple choice
Read the full network assurance explanation →

An organization wants to implement a centralized logging solution for multiple Linux servers. Which service should run on the central server to receive syslog messages?

Question 20mediummultiple choice
Read the full DHCP explanation →

A DHCP server assigns IP addresses to clients, but some clients are not receiving the correct gateway. Which configuration file should be checked on the DHCP server?

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Frequently asked questions

What does the LPIC-1 exam test about Essential System Services and Networking?
Essential System Services and Networking questions test whether you can apply the concept in context, not just recognise a definition.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just Essential System Services and Networking questions in a focused session?
Yes — the session launcher on this page draws every question from the Essential System Services and Networking domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other LPIC-1 topics?
Use the topic links above to move to related areas, or go back to the LPIC-1 question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the LPIC-1 exam covers. They are not copied from any real exam or dump site.