Comprehensive and Detailed Explanation From Exact Extract:
Content filtering allows administrators to block or allow access to websites based on categories (e.g., social media, adult content, streaming). On a SOHO (Small Office/Home Office) router, this is often built-in or available via DNS-level filtering, and is the most appropriate method for enforcing browsing policies without needing to touch each individual device.
A: Secure management access protects router admin interfaces but doesn't control user browsing.
B: Group Policy Editor is a Windows tool, not used on routers.
D: A firewall can block specific IPs or ports, but it doesn't categorize web content.
Reference:
CompTIA A+ 220-1102 Objective 2.2: Compare and contrast security measures and tools.
Study Guide Section: SOHO router security features - content filtering, parental controls

Comprehensive and Detailed Explanation From Exact Extract:
When an OS reaches its end of life (EOL), it no longer receives updates or support, including critical security patches.
From the Quentin Docter Study Guide:
"End-of-life means the manufacturer no longer supports the OS with updates or security patches, which exposes systems to vulnerabilities unless upgraded".
All-in-One Exam Guide adds:
"End-of-life notifications serve as a final warning that continued use of the OS will be insecure and unsupported. It's crucial for administrators to plan migration".

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

Comprehensive and Detailed Explanation From Exact Extract:
If a system becomes unresponsive while opening a specific spreadsheet, the issue is likely tied to the file's size or the complexity of its content (e.g., embedded formulas, macros, or graphics). High memory utilization caused by the file can lead to temporary freezing or application "Not Responding" messages. Checking the spreadsheet's file size and monitoring system memory in Task Manager will help isolate performance bottlenecks.
A: Anti-malware logs are important for security troubleshooting but less likely relevant to spreadsheet-related performance issues.
B: Workstation repair is for system-wide problems and not necessary for a single-file issue.
C: Bandwidth relates to network usage and wouldn't impact opening a local file.
Reference:
CompTIA A+ 220-1102 Objective 3.3: Troubleshoot common application issues.
Study Guide Section: Troubleshooting application slowness and performance using Task Manager and resource monitoring tools

Comprehensive and Detailed Explanation From Exact Extract:
RADIUS (Remote Authentication Dial-In User Service)provides centralized Authentication, Authorization, and Accounting (AAA) for users who connect and use a network service.
FromQuentin Docter - CompTIA A+ Complete Study Guide:
"RADIUS is a widely used protocol for implementing AAA in network environments, allowing centralized control over user access and accounting."