Courseiva

LFCS · topic practice

Networking practice questions

Use this page to practise Networking questions for this certification. Focus on how the exam tests networking in scenario format — understanding the why behind each answer builds more durable knowledge than memorising options.

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: Networking
Practice 10 questionsBrowse domain →

What the exam tests

What to know about Networking

Networking questions on this certification test your ability to deploy and manage networking concepts in scenario-based situations.

Core Networking concepts and how they apply in real-world cloud scenarios.

How to deploy networking correctly and verify the outcome.

Troubleshooting networking issues by interpreting error output and system state.

Cloud best practices and Networking design trade-offs tested by this certification.

Watch out for

Common Networking exam traps

  • ▸Selecting the most expensive service when a simpler managed option meets the requirement.
  • ▸Forgetting that cloud resources must be explicitly secured — defaults are rarely secure.
  • ▸Choosing a global service fix when the issue is region-specific.
  • ▸Overlooking cost implications of cross-region data transfer in architecture questions.

Practice set

Networking questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice
Read the full Networking explanation →

A system administrator notices that a web server is not reachable from the internet but is reachable from the internal network. The server's IP is 10.0.1.10/24, and the gateway is 10.0.1.1. Which command should be used to verify the default gateway configuration?

Question 2easymultiple choice
Read the full Networking explanation →

A developer needs to temporarily allow incoming TCP connections on port 8080 for testing. Which iptables command adds a rule to the INPUT chain to accept this traffic?

Question 3hardmultiple choice
Read the full Networking explanation →

A server has two network interfaces: eth0 (10.0.1.10/24, gateway 10.0.1.1) and eth1 (192.168.1.10/24, no gateway). Both are up. The default gateway is set to 10.0.1.1. A ping to 8.8.8.8 fails, but ping to 10.0.1.1 succeeds. What is the most likely cause?

Question 4easymultiple choice
Read the full Networking explanation →

An administrator wants to permanently configure a static IP address on a CentOS 7 system. Which file should be edited?

Question 5mediummultiple choice
Review the full subnetting walkthrough →

A network administrator needs to block all incoming SSH traffic (port 22) from the 192.168.2.0/24 subnet. Which iptables command accomplishes this?

Question 6hardmultiple choice
Read the full Networking explanation →

An administrator is troubleshooting intermittent connectivity issues. Running 'ping -c 100 -i 0.2 10.0.0.1' shows about 5% packet loss. What is the primary purpose of the '-i 0.2' option?

Question 7easymultiple choice
Read the full Networking explanation →

Which command displays the listening UDP ports on a Linux system?

Question 8mediummultiple choice
Read the full Networking explanation →

A server needs to forward packets between two networks: 10.0.1.0/24 on eth0 and 10.0.2.0/24 on eth1. Which sysctl parameter must be enabled?

Question 9mediummulti select
Review the full routing breakdown →

Which TWO commands can be used to display the routing table on a Linux system?

Question 10hardmulti select
Review the full routing breakdown →

Which THREE conditions must be met for a Linux system to function as a router between two networks?

Question 11easymulti select
Read the full Networking explanation →

Which TWO commands can be used to resolve a hostname to an IP address?

Question 12hardmultiple choice
Review the full routing breakdown →

A host with this routing table can ping 10.0.2.1 but cannot ping 8.8.8.8. What is the most likely cause?

Exhibit

Refer to the exhibit.

# ip route show
10.0.1.0/24 dev eth0 proto kernel scope link src 10.0.1.10
10.0.2.0/24 dev eth1 proto kernel scope link src 10.0.2.10
default via 10.0.1.1 dev eth0
Question 13mediummultiple choice
Read the full Networking explanation →

An administrator is unable to SSH into the server from a remote host at 192.168.1.100. Based on the exhibited iptables rules, what is the most likely reason?

Network Topology
10 840 ACCEPT alllo * 0.0.0.0/05 300 ACCEPT tcp0 0 DROP tcpRefer to the exhibit.
Question 14hardmultiple choice
Review the full subnetting walkthrough →

You are a systems administrator for a company that runs a critical application on a Linux server with two network interfaces: eth0 (public IP 203.0.113.10/24, gateway 203.0.113.1) and eth1 (private IP 10.0.1.10/24, no gateway). The server must be accessible via SSH (port 22) from the internet, but only from a specific management subnet 198.51.100.0/24. Additionally, the server should be able to access the internet for package updates, but no other inbound traffic from the internet is allowed. The local firewall is iptables. After implementing rules, you find that the server cannot reach the internet (e.g., ping 8.8.8.8 fails), but SSH from the management subnet works. What is the most likely cause?

Question 15mediummultiple choice
Review the full routing breakdown →

You are troubleshooting a Linux server that acts as a router between two networks: 10.0.1.0/24 (eth0) and 10.0.2.0/24 (eth1). IP forwarding is enabled. Hosts on 10.0.1.0/24 can ping the server's eth0 IP (10.0.1.1), but cannot ping hosts on 10.0.2.0/24 (e.g., 10.0.2.10). The server can ping both 10.0.2.10 and 10.0.1.10. The iptables FORWARD chain policy is ACCEPT. What is the most likely cause?

Question 16mediummultiple choice
Read the full VPN explanation →

A company has a server with two network interfaces: eth0 (192.168.1.10/24, gateway 192.168.1.1) and eth1 (10.0.0.10/24, gateway 10.0.0.1). The server needs to reach a remote network 172.16.0.0/16 via a VPN tunnel that terminates at 10.0.0.5 on eth1. Which command should be used to add a route for this traffic?

Question 17hardmultiple choice
Review the full routing breakdown →

A system administrator is troubleshooting network connectivity from a server that can reach internal resources but cannot access the internet. The server's /etc/sysconfig/network-scripts/ifcfg-eth0 file contains: BOOTPROTO=static, IPADDR=10.0.0.10, NETMASK=255.255.255.0, GATEWAY=10.0.0.1. The administrator runs 'ip route show' and sees: default via 10.0.0.1 dev eth0. However, 'ping 8.8.8.8' fails. Which is the most likely cause?

Question 18easymultiple choice
Read the full Networking explanation →

A system administrator needs to permanently configure a network interface named ens33 with a static IPv4 address of 192.168.1.100/24 and a default gateway of 192.168.1.1 on a system using NetworkManager. Which command should the administrator use to achieve this?

Question 19mediummultiple choice
Review the full subnetting walkthrough →

A server has two network interfaces: eth0 (10.0.0.10/24) and eth1 (192.168.1.10/24). The server needs to act as a router for a subnet 172.16.0.0/24, forwarding packets between it and the 10.0.0.0/24 network. Which sysctl parameter must be set to a value of 1 to enable IP forwarding?

Question 20hardmulti select
Read the full Networking explanation →

Which TWO are valid methods to configure a network interface on a Linux system?

Continue with 20-question session →

Free account

Track your progress over time

Create a free account to save your results and see which topics improve across sessions.

Sign up freeLog in

Focused Networking sessions

Start a Networking only practice session

Every question in these sessions is drawn from the Networking domain — nothing else.

10 questions20 questions30 questions50 questions
Browse all Networking questions →Mixed LFCS session

Related practice questions

Related LFCS topic practice pages

Move into related areas when this topic feels solid.

User and Group Management practice questions

Practise LFCS questions linked to User and Group Management.

Operation of Running Systems practice questions

Practise LFCS questions linked to Operation of Running Systems.

Essential Commands practice questions

Practise LFCS questions linked to Essential Commands.

Networking practice questions

Practise LFCS questions linked to Networking.

Service Configuration practice questions

Practise LFCS questions linked to Service Configuration.

Storage Management practice questions

Practise LFCS questions linked to Storage Management.

LFCS fundamentals practice questions

Practise LFCS questions linked to LFCS fundamentals.

LFCS scenario practice questions

Practise LFCS questions linked to LFCS scenario.

LFCS troubleshooting practice questions

Practise LFCS questions linked to LFCS troubleshooting.

Frequently asked questions

What does the LFCS exam test about Networking?
Networking questions on this certification test your ability to deploy and manage networking concepts in scenario-based situations.
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 Networking questions in a focused session?
Yes — the session launcher on this page draws every question from the 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 LFCS topics?
Use the topic links above to move to related areas, or go back to the LFCS 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 LFCS exam covers. They are not copied from any real exam or dump site.