Comprehensive and Detailed Explanation From Exact Extract:
Spear phishingtargets a specific individual using personalized tactics, as seen in emails impersonating a CEO to deceive a secretary.
FromQUENTIN DOCTER - COMPTIA A+ COMPLETE study GUIDE:
"Spear phishing targets specific individuals or roles within an organization using tailored messages to increase success rates."

Comprehensive and Detailed Explanation From Exact Extract:
Background applications can significantly drain a smartphone's battery, even when the device is idle. A technician should first review which apps are running in the background and consuming power through the battery usage section of the OS. Disabling or restricting power-hungry apps often resolves poor battery life.
A). Storage usage doesn't significantly affect battery life.
B). End of software support is unrelated to battery performance unless it's causing inefficient processes, which would still be secondary.
C). Charger wattage affects charging speed, not battery life after charging.
Reference:
CompTIA A+ 220-1102 Objective 3.3: Troubleshoot common mobile OS and application issues.
Study Guide Section: Diagnosing battery and app performance issues on mobile devices

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:
Multi-Factor Authentication (MFA) requires at least two different types of authentication factors:
* Something you know (e.g., password or PIN)
* Something you have (e.g., smartphone or hardware token)
* Something you are (e.g., fingerprint or facial recognition)
Option A, sending a code to the user's phone, is an example of "something you have" - a physical device that receives a one-time passcode. Combined with a password, this forms a proper MFA implementation.
B: Date of birth is another knowledge-based factor (like a password), not a second factor type.
C: Solving a math problem is not a recognized authentication factor.
D: A PIN is also "something you know" and does not count as a distinct MFA factor when paired with a password.
Reference:
CompTIA A+ 220-1102 Objective 2.2: Compare and contrast common security measures and authentication technologies.
Study Guide Section: Authentication factors - password, biometrics, tokens, MFA

Comprehensive and Detailed Explanation From Exact Extract:
The user's issue likely stems from amobile data restriction or cap, especially since uploads work on Wi-Fi but not cellular. Checkingdata usage limitswill help determine if mobile uploads are blocked.
FromAll-in-One Exam Guide:
"When data-intensive functions fail on mobile networks but not on Wi-Fi, it's often due to data caps or metered connection limits."