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CompTIA XK0-006 Exam Syllabus Topics:

Topic	Details
Topic 1	Troubleshooting: Addresses diagnosing and resolving issues across system health, hardware, storage, networking, security configurations, and performance optimization.
Topic 2	Services and User Management: Covers day-to-day Linux administration including file management, user accounts, processes, software, services, and container operations.
Topic 3	Security: Focuses on securing Linux systems through authentication, firewalls, OS hardening, account policies, cryptography, and compliance checks.
Topic 4	Automation, Orchestration, and Scripting: Covers task automation with tools like Ansible, shell and Python scripting, Git version control, and responsible AI-assisted development.

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CompTIA Linux+ Certification Exam Sample Questions (Q77-Q82):

NEW QUESTION # 77
A systems administrator needs to open the DNS TCP port on a Linux system from network
10.0.0.0/24. Which of the following commands should the administrator use for this task?

A. ufw enable 53/tcp from 10.0.0.0/24
B. ufw allow dns/tcp to 10.0.0.0/24
C. ufw allow 53/tcp from 10.0.0.0/24
D. ufw disable from 10.0.0.0/24

Answer: C

Explanation:
The ufw allow 53/tcp from 10.0.0.0/24 command explicitly opens TCP port 53 (DNS) for connections coming from the 10.0.0.0/24 network, which is the correct way to configure this firewall rule.

NEW QUESTION # 78
An administrator needs to remove the directory /home/user1/dataand all of its contents.
Which of the following commands should the administrator use?

A. rm -r /home/user1/data
B. cut -d /home/user1/data
C. rmdir -p /home/user1/data
D. ln -d /home/user1/data

Answer: A

Explanation:
The rm -r command recursively removes a directory and all of its contents (files and subdirectories), which is required for deleting /home/user1/data.

NEW QUESTION # 79
Due to application compatibility issues, the Python 3 OpenSSL library should not be upgraded.
Which of the following commands should the systems administrator use to ensure the package stays at the current version?

A. apt-mark hold python3-opensal
B. apt set-selections python3-openssl
C. dpkg --hold python3-openssl
D. echo "python3-openssl > hold" |apt set-selections

Answer: A

Explanation:
This command places the specified package on hold, preventing it from being upgraded during system updates while allowing other packages to be updated normally.

NEW QUESTION # 80
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:

Which of the following accurately explains the issue?

A. One of the DNS records has not been signed with a DNSSEC-supported key, and this is causing some web browsers to reject the DNS response.
B. The DNS configuration is missing corresponding AAAA records and PTR records, and this is causing clients to fail the hostname translation.
C. DNS returns all three records in a different order each time, and the browser typically uses the first address in the DNS response.
D. The administrator has incorrectly configured the DNS server to be an iterative resolver instead of an authoritative resolver.

Answer: C

Explanation:
With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server's IP appears first (about one in three times), those users cannot connect.

NEW QUESTION # 81
Which of the following most accurately describes a webhook?

A. An authentication method for web-server communication
B. An HTTP-based callback function
C. An SNMP-based API for network device monitoring
D. A means to transmit sensitive information between systems

Answer: B

Explanation:
A webhook is an HTTP-based callback that allows one system to send real-time data or notifications to another system when an event occurs.

NEW QUESTION # 82
......

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