A server on the 192.168.1.0/24 network cannot communicate with a host at 192.168.1.100. You check the ARP cache with `arp -a` and see an entry for 192.168.1.100 with the MAC address `00:00:00:00:00:00`. What does this indicate?

The DNS server is not resolving the hostname.

The host is reachable and the MAC address is correct.

The default gateway is misconfigured.

The ARP resolution failed, and the host may be down or unreachable.

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

Domain 9Objective 3

109.3 Basic Network Troubleshooting LPIC-1 Practice Questions (Page 5)

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 21–25

21foundation · easy
Which command is used to query DNS servers and obtain domain name resolution information?
Select an answer first
22application · medium
A Linux administrator is troubleshooting a server that cannot reach the internet, although it can reach other hosts on the local 192.168.1.0/24 subnet. Which `ip` command would you run to verify the default gateway configuration?
Select an answer first
23foundation · easy
Which tcpdump option is used to specify the network interface to capture on?
Select an answer first
24foundation · easy
Which command is primarily used to display active network connections, listening ports, and protocol statistics?
Select an answer first
25expert · hard
A server on the 192.168.1.0/24 network cannot communicate with a host at 192.168.1.100. You check the ARP cache with `arp -a` and see an entry for 192.168.1.100 with the MAC address `00:00:00:00:00:00`. What does this indicate?
Select an answer first

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109.3 Basic Network Troubleshooting LPIC-1 Practice Questions (Page 5)

Questions 21–25

Which command is used to query DNS servers and obtain domain name resolution information?

A Linux administrator is troubleshooting a server that cannot reach the internet, although it can reach other hosts on the local 192.168.1.0/24 subnet. Which `ip` command would you run to verify the default gateway configuration?

Which tcpdump option is used to specify the network interface to capture on?

Which command is primarily used to display active network connections, listening ports, and protocol statistics?

A server on the 192.168.1.0/24 network cannot communicate with a host at 192.168.1.100. You check the ARP cache with `arp -a` and see an entry for 192.168.1.100 with the MAC address `00:00:00:00:00:00`. What does this indicate?

Keep studying — Topic 109: Networking Fundamentals