A Linux server hosts a service on TCP port 8443. The firewall has a default DROP policy on the INPUT chain. The administrator added a rule to allow TCP traffic on port 8443 from the network 192.168.1.0/24, but clients on that network still cannot connect. Which additional check should the administrator perform?

Check if the firewall rule was added to the OUTPUT chain instead of the INPUT chain

Verify that the server has a default route configured

Check if the DNS server can resolve the server's hostname

Verify that the service is listening on the correct interface

CompTIALinux+

Domain 5Objective 3

Networking XK0-006 Practice Questions (Page 1)

Part of the Troubleshooting domain, which accounts for 22% of the XK0-006 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–13 in this domain), expect 2–3 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

8concepts

22%of the exam

Questions 1–5

1foundation · easy
You suspect that a routing table entry is incorrect. Which command would you use to view the current routing table?
Select an answer first
2foundation · easy
Which command would you use to query a specific DNS server for the IP address of a hostname, bypassing the system's default resolver?
Select an answer first
3foundation · easy
Which file on a Linux system is used to configure the DNS resolver (the servers the system queries for name resolution)?
Select an answer first
4application · medium
A Linux administrator is troubleshooting a connectivity issue where a server can ping its own IP address but cannot reach any other host on the same subnet. Which command should be used to check whether the server's network interface is properly configured?
Select an answer first
5expert · hard
A Linux server hosts a service on TCP port 8443. The firewall has a default DROP policy on the INPUT chain. The administrator added a rule to allow TCP traffic on port 8443 from the network 192.168.1.0/24, but clients on that network still cannot connect. Which additional check should the administrator perform?
Select an answer first

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Networking XK0-006 Practice Questions (Page 1)

Questions 1–5

You suspect that a routing table entry is incorrect. Which command would you use to view the current routing table?

Which command would you use to query a specific DNS server for the IP address of a hostname, bypassing the system's default resolver?

Which file on a Linux system is used to configure the DNS resolver (the servers the system queries for name resolution)?

A Linux administrator is troubleshooting a connectivity issue where a server can ping its own IP address but cannot reach any other host on the same subnet. Which command should be used to check whether the server's network interface is properly configured?

Keep studying — Troubleshooting