A server has a service that should be listening on port 3306 for MySQL, but clients cannot connect. You run `ss -tlnp` and see no output for port 3306. However, you know the MySQL service is running. What is the MOST likely cause?

The default gateway is misconfigured.

MySQL is configured to listen only on a specific IP address that is not the server's primary IP.

The firewall is blocking port 3306.

The MySQL service is not actually running.

What is the primary purpose of the traceroute command?

To display the path packets take to a destination, including each hop

To show the MAC address of the destination

To display the routing table of the local system

To test the reachability of a host and measure round-trip time

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

Domain 9Objective 3

109.3 Basic Network Troubleshooting LPIC-1 Practice Questions (Page 8)

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 36–40

36expert · hard
A server has a service that should be listening on port 3306 for MySQL, but clients cannot connect. You run `ss -tlnp` and see no output for port 3306. However, you know the MySQL service is running. What is the MOST likely cause?
Select an answer first
37foundation · easy
Which command is used to view and change Ethernet device settings such as link speed and duplex?
Select an answer first
38foundation · easy
What is the primary purpose of the traceroute command?
Select an answer first
39foundation · easy
Which command is the traditional tool for viewing and modifying the routing table?
Select an answer first
40foundation · easy
Which log file commonly contains system messages, including network errors, on many Linux distributions?
Select an answer first

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109.3 Basic Network Troubleshooting LPIC-1 Practice Questions (Page 8)

Questions 36–40

A server has a service that should be listening on port 3306 for MySQL, but clients cannot connect. You run `ss -tlnp` and see no output for port 3306. However, you know the MySQL service is running. What is the MOST likely cause?

Which command is used to view and change Ethernet device settings such as link speed and duplex?

What is the primary purpose of the traceroute command?

Which command is the traditional tool for viewing and modifying the routing table?

Which log file commonly contains system messages, including network errors, on many Linux distributions?

Keep studying — Topic 109: Networking Fundamentals