Comprehensive and Detailed Explanation From Exact Extract:
NET Framework versions are often required for applications to run. If an older app requires .NET Framework
3.5, it must be explicitly installed as it is not included by default in newer versions of Windows. The best method to do this safely is through the built-in "Turn Windows features on or off" utility, which downloads and installs it via official Microsoft services.
B: Using third-party repositories is unsafe and not recommended.
C: Installing .NET 4 does not include 3.5; versions are not fully backward compatible.
D: The issue is technical, not a security incident for the SOC team.
Reference:
CompTIA A+ 220-1102 Objective 3.3: Troubleshoot common software, application, and OS security issues.
Study Guide Section: Managing application dependencies (e.g., .NET Framework, Java)

Comprehensive and Detailed Explanation From Exact Extract:
To prevent external access, the technician should avoid exposing the surveillance system's port to the public internet. Port mapping (also known as port forwarding) is the method used to control which internal devices and ports are accessible from the outside. By not configuring port forwarding for the device, external login attempts are effectively blocked.
B: Subnetting organizes IP addresses but doesn't directly restrict access.
C: A static IP ensures consistent addressing but does not secure access.
D: Content filtering is used to restrict web content, not to block access to a web interface.
Reference:
CompTIA A+ 220-1102 Objective 2.2: Compare and contrast security measures and tools.
Study Guide Section: SOHO router security - port forwarding and blocking external access

Comprehensive and Detailed Explanation From Exact Extract:
FAT32cannot support files larger than 4GB.NTFSsupports large file sizes and is compatible across Windows systems, making it the correct choice for transferring a 4.57GB file.
FromAll-in-One Exam Guide:
"NTFS is the preferred file system for large file transfers within Windows. FAT32 has a 4GB file size limit, which makes it unsuitable for modern use cases involving large files."

Comprehensive and Detailed Explanation From Exact Extract:
TheDo Not Disturbsetting in Windows Notification settings allows users to suppress all notification banners and sounds during presentations or video calls.
FromTravis Everett - All-in-One Exam Guide:
"Use Windows 'Do Not Disturb' to prevent notifications from interrupting full-screen apps like video conferencing."

Comprehensive and Detailed Explanation From Exact Extract:
Keychainis the built-in macOS utility that manages and stores credentials, including passwords and certificates.
According toQuentin Docter - CompTIA A+ Complete Study Guide:
"Keychain Access in macOS is used for managing and storing passwords securely, similar to credential managers in Windows."