A user reports they cannot reach any external websites, but they can reach internal servers. You run `ping 8.8.8.8` and it succeeds, but `ping google.com` fails with 'unknown host'. What is the MOST likely cause?

The network cable is unplugged.

Users report intermittent connectivity issues to a remote server. You run `ping` and it shows occasional packet loss. You run `traceroute` and see that hop 5 returns `* * *` for all three probes, but the final destination is reachable. What does this indicate?

Hop 5 is down and packets are being lost.

Hop 5 is likely a router that does not respond to ICMP, but it is still forwarding packets.

The DNS server is not resolving the hostname.

The default gateway is misconfigured.

Which file is commonly used for network configuration on Debian-based systems?

/etc/sysconfig/network-scripts/ifcfg-eth0

In traceroute output, what does an asterisk (*) for a hop typically indicate?

The hop is unreachable because the TTL expired

The hop is the final destination

The hop is a duplicate of the previous one

The router at that hop did not respond within the timeout

LPI LPIC-1:Linux Administrator (101-500)

Domain 9Objective 3

109.3 Basic Network Troubleshooting LPIC-1 Practice Questions (Page 3)

Part of the Topic 109: Networking Fundamentals domain, which makes up ~11% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–7 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

14concepts

14 Concepts in This Objective

Identify common network troubleshooting tools
Use ping for connectivity testing
Use traceroute for path analysis
Use netstat and ss for network statistics
Use ip for interface and route inspection
Check DNS resolution
Check ARP cache
Check routing and gateway
Check firewall and packet filtering
Check network interface status
Check network configuration files
Use tcpdump for packet capture
Check system logs for network errors
Troubleshoot common network issues

Questions 11–15

11application · medium
A user reports they cannot reach any external websites, but they can reach internal servers. You run `ping 8.8.8.8` and it succeeds, but `ping google.com` fails with 'unknown host'. What is the MOST likely cause?
Select an answer first
12foundation · easy
Which tool provides more detailed DNS query output than nslookup and is often preferred for troubleshooting?
Select an answer first
13expert · hard
Users report intermittent connectivity issues to a remote server. You run `ping` and it shows occasional packet loss. You run `traceroute` and see that hop 5 returns `* * *` for all three probes, but the final destination is reachable. What does this indicate?
Select an answer first
14foundation · easy
Which file is commonly used for network configuration on Debian-based systems?
Select an answer first
15foundation · easy
In traceroute output, what does an asterisk (*) for a hop typically indicate?
Select an answer first

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