A managed switch provides advanced features such as traffic monitoring and VLAN configuration, allowing a technician to view network statistics for devices on the local subnet.
Why Not B (Router): A router connects different networks and directs traffic between them but does not provide detailed subnet-level statistics.
Why Not C (Access point): Access points provide wireless connectivity but lack traffic monitoring features.
Why Not D (Firewall): A firewall filters traffic but is not used for monitoring detailed statistics on a local subnet.
CompTIA A+ Exam Reference: Core 1 (220-1201), Section 2.6, network monitoring tools.

Inlaser printers, thefuser unitis responsible formelting the toner onto the paperusing heat and pressure. If the toner rubs off easily, it's a clear sign thefuser is failing or not heating properly. Replacing the fuser will ensure the toner bonds correctly to the paper.
Option B (Drum):Transfers the image, but doesn't fuse the toner.
Option C (Developer roller):Applies toner to the drum wouldn't cause toner to rub off.
Option D (Discharge lamp):Prepares the drum for a new image; not related to toner adhesion.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 3.7: Given a scenario, troubleshoot common printer problems.

A RAID 1 array uses disk mirroring, meaning all data is written identically to two drives. When one drive fails, the other contains a complete, current copy of the data. CompTIA A+ emphasizes that RAID 1 is designed for fault tolerance, allowing continued operation even after a disk failure.
The correct action is to replace the defective drive and allow the RAID controller to rebuild (sync) the mirror onto the new disk. This restores redundancy and ensures ongoing data protection. The system can typically continue running during the rebuild process.
Option A is incorrect because attempting to repair a failed drive is unreliable and unnecessary-RAID 1 already provides a healthy copy. Option B ignores the importance of restoring redundancy, leaving the system vulnerable to data loss if the remaining drive fails. Option D (restore from backup) is unnecessary because RAID 1 already preserves the data.
Therefore, the best solution is to install a new drive and resynchronize the array, preserving all data with minimal disruption.

Abulging tablet casingis a classic sign of aswollen lithium-ion battery, often caused by age, overheating, or overcharging. This is adangerous condition, as swollen batteries can rupture or catch fire. It also explains why the tablet only works when plugged in - the battery is no longer holding a charge.
Option A:Power supply issues wouldn't cause physical bulging.
Option B:A bad charge port wouldn't cause screen damage or physical distortion.
Option D:A broken screen could cause display issues, but not the bulging chassis.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 1.4: Given a scenario, configure settings and use cases for laptops and mobile devices.