A server has two interfaces: eth0 (192.168.1.10/24) and eth1 (10.0.0.10/24). The server can ping hosts on both directly connected networks but cannot reach the internet. The administrator runs `ip route show` and sees only the two connected routes, with no default route. What is the most likely cause?

The firewall is blocking outbound traffic.

The default gateway is missing from the routing table.

A service running on port 8080 is intermittently unavailable. The administrator runs `ss -tlnp` and sees the service listening on 127.0.0.1:8080. External clients cannot connect, but local connections work. What is the most likely cause?

The service is bound to the loopback interface only, so it is not reachable from the network.

The service is crashing and restarting frequently.

The firewall is blocking port 8080 from external sources.

The default gateway is misconfigured.

After forming a hypothesis about the cause of a network problem, what is the next logical step in a systematic troubleshooting approach?

Escalate the issue to a senior engineer

Test the hypothesis by implementing a solution

Reboot the system to clear the issue

Document the problem for future reference

LPI LPIC-2:Linux Engineer (201-450)

Domain 6Objective 3

205.3 Troubleshooting Network Issues (weight: 4) LPIC-2 Practice Questions (Page 2)

Part of the Topic 205: Networking Configuration domain, which makes up ~10% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 43 practice questions to prepare you well beyond it. (estimate)

43questions here

9free pages

15concepts

15 Concepts in This Objective

Identify network troubleshooting methodology
Use basic network diagnostic tools
Inspect network interfaces and configuration
Analyze routing tables and connectivity
Examine ARP and neighbor tables
Check DNS resolution
Inspect network sockets and connections
Capture and analyze network traffic
Test firewall and packet filtering
Measure bandwidth and throughput
Monitor network statistics and errors
Troubleshoot wireless network issues
Interpret system logs for network events
Resolve common network configuration errors
Use advanced troubleshooting tools

Questions 6–10

6foundation · easy
Which command-line tool is used to capture network packets and display them in real time for analysis?
Select an answer first
7application · medium
A server's network interface stopped working after a kernel update. The administrator runs `ip link show eth0` and sees that the interface is DOWN. Which command would provide the most relevant information about why the interface failed during boot?
Select an answer first
8application · medium
A server has two interfaces: eth0 (192.168.1.10/24) and eth1 (10.0.0.10/24). The server can ping hosts on both directly connected networks but cannot reach the internet. The administrator runs `ip route show` and sees only the two connected routes, with no default route. What is the most likely cause?
Select an answer first
9expert · hard
A service running on port 8080 is intermittently unavailable. The administrator runs `ss -tlnp` and sees the service listening on 127.0.0.1:8080. External clients cannot connect, but local connections work. What is the most likely cause?
Select an answer first
10foundation · easy
After forming a hypothesis about the cause of a network problem, what is the next logical step in a systematic troubleshooting approach?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to LPIC-2

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Linux Professional Institute. “LPIC-2” is a trademark of its owner, used for identification only.

205.3 Troubleshooting Network Issues (weight: 4) LPIC-2 Practice Questions (Page 2)

Questions 6–10

Which command-line tool is used to capture network packets and display them in real time for analysis?

A server's network interface stopped working after a kernel update. The administrator runs `ip link show eth0` and sees that the interface is DOWN. Which command would provide the most relevant information about why the interface failed during boot?

A service running on port 8080 is intermittently unavailable. The administrator runs `ss -tlnp` and sees the service listening on 127.0.0.1:8080. External clients cannot connect, but local connections work. What is the most likely cause?

After forming a hypothesis about the cause of a network problem, what is the next logical step in a systematic troubleshooting approach?

Keep studying — Topic 205: Networking Configuration