Comprehensive and Detailed Explanation From Exact Extract:
If internal resources (such as intranet or internal apps) can't be accessed but external sites work, this often points to aDNS issue, where the system isn't resolving internal domain names correctly.
FromAll-in-One Exam Guide:
"When internet access is functional but internal sites fail to load, the issue usually lies with DNS resolution.
Internal resources often require internal DNS servers, which may not be configured correctly."

Comprehensive and Detailed Explanation From Exact Extract:
An incident report documents key details such as the cause of the outage, steps taken to resolve it, and measures to prevent recurrence. It is a post-mortem analysis often shared with stakeholders to improve future response.
According to the Quentin Docter - CompTIA A+ Complete Study Guide:
"An incident report provides a summary of an event that disrupted normal operations and includes a timeline of what occurred, how the issue was diagnosed and fixed, and who was involved in the resolution".
This is reaffirmed in Travis Everett's All-in-One Guide:
"Documentation after an incident helps technical teams and management review the situation and learn from it. This is formalized in an incident report".

Comprehensive and Detailed Explanation From Exact Extract:
The su (substitute user) command is used in Linux to switch to another user account, most commonly to escalate privileges by switching to the root (administrator) account. It allows administrative tasks to be performed in a terminal session.
A: runas is a Windows command for executing a program under another user's context.
B: cmcl is not a valid Linux or administrative command.
C: net user is a Windows command for managing local user accounts.
Reference:
CompTIA A+ 220-1102 Objective 1.9: Identify common features and tools of the Linux client/desktop OS.
Study Guide Section: Linux command-line tools - su, sudo

Comprehensive and Detailed Explanation From Exact Extract:
In the context of artificial intelligence, "hallucinations" refer to instances where an AI system generates information that is plausible-sounding but factually incorrect or entirely fabricated. This is a known limitation of large language models, including generative AI tools.
A: Data privacy refers to the protection of personal or sensitive data, not content accuracy.
C: Appropriate use relates to ethical and policy-based concerns, not factual correctness.
D: Plagiarism involves presenting someone else's work as your own - this situation is about accuracy, not ownership.
Reference:
CompTIA A+ 220-1102 Objective 4.4: Identify basic concepts of scripting and automation.
Study Guide Section: AI tools and responsible usage - hallucinations and fact-checking outputs

Comprehensive and Detailed Explanation From Exact Extract:
The ext4 (Fourth Extended Filesystem) is the most widely used default filesystem in modern Linux distributions. It is designed for high performance, scalability, and reliability, and is supported by all mainstream Linux kernels.
A). exFAT is used for cross-platform external drives, not native Linux systems.
B). APFS is Apple's proprietary filesystem for macOS and iOS.
D). NTFS is the default filesystem for Windows, not Linux.
Reference:
CompTIA A+ 220-1102 Objective 1.9: Identify common features and tools of the Linux client/desktop OS.
Study Guide Section: Filesystem types in Linux - ext3, ext4, and their characteristics