Mobile Device Management (MDM) enables administrators to enforce controls on enterprise devices, such as restricting apps, ensuring compliance, and remotely managing security policies.
Why Not B (MFA): Multi-Factor Authentication secures user access but does not control device configurations.
Why Not C (VPN): VPN secures communication but does not enforce device controls.
Why Not D (SSL): SSL secures data in transit but does not provide device management.
CompTIA A+ Exam Reference: Core 2 (220-1102), Section 2.7, device management concepts.

Dedicated resources (sometimes called single-tenant or bare metal) guarantee that physical hardware is allocated exclusively to one customer and not shared.
From CompTIA A+ 220-1101 Official Study Guide, Objective 3.7 - Cloud deployment models:
"Dedicated resources ensure data isolation at the hardware level for compliance and security." Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 3: Cloud Deployment CompTIA Exam Objectives 220-1101, Domain 3.7

RAID 1, also known as disk mirroring, duplicates data identically to two drives, ensuring full redundancy if one drive fails. Because the workstation only has two drives, RAID 1 is the only RAID level that provides fault tolerance under this constraint, exactly as described in the CompTIA A+ study guide.
RAID 0 offers no redundancy, RAID 5 requires at least three drives, and RAID 10 requires at least four drives.
RAID 1 is the recommended configuration for small environments or workstations that rely on data integrity and quick recovery, matching CompTIA's guidance for redundancy in systems with limited drive availability.

To add additional wired network devices in a simple and cost-effective manner, the best solution is an unmanaged switch. CompTIA A+ explains that unmanaged switches require no configuration, provide instant port expansion, and operate using plug-and-play functionality. This makes them ideal for home offices where the user wants more Ethernet ports without dealing with administrative overhead or complex setup.
An unmanaged switch automatically forwards traffic using MAC addresses, expanding the network without altering IP configuration or security settings. It is inexpensive compared to other networking equipment and requires no firmware updates, VLAN management, or routing knowledge.
A DSL modem or cable modem provides internet service but does not increase the number of available network ports beyond the single LAN port commonly offered. A firewall controls traffic but does not expand physical connectivity. Therefore, neither modem nor firewall options meet the requirement of adding more wired devices.
Thus, the unmanaged switch is the simplest, cheapest, and most practical choice for expanding connectivity in a home office environment.

Amaintenance kitfor a laser printer often includesrollers, fuser, and other partsthat wear out over time. If the printer issmudging and misfeeding, it's a sign thatmultiple components are failing, which a maintenance kit is designed to resolve.
Option A (Fuser):May cause smudging if it's not heating correctly, but it won't resolve paper misfeeds alone.
Option C (Corona wire):Can cause poor image quality if dirty but doesn't affect paper feeding.
Option D (Toner cartridge):Can cause streaks if defective, but not paper feed issues.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 3.4: Given a scenario, install and configure printers.