If a technician is implementing a SOHO wireless solution with three access points and wants to avoid high latency, the technician should configure all devices with different channels. By configuring all devices with different channels, the technician can ensure that the wireless signals from each access point do not interfere with each other, which can cause high latency.

VRAM (Video Random Access Memory) is a special-purpose memory type used by graphics controllers to store image data that is displayed on the screen. VRAM is faster and more expensive than regular RAM, and it allows the graphics controller to access the image data directly without involving the CPU or the system memory. VRAM can improve the performance and quality of graphics-intensive applications, such as video editing, gaming, and 3D rendering.
Reference:
* Ram Flashcards | Quizlet, question "Which of the following is a special-purpose memory type used by graphics controllers?".
* Nvidia Unveils Big Accelerator Memory: Solid-State Storage for GPUs, paragraph 4.
* US5801706A - Special purpose memory for graphics and display apparatus ..., abstract.

A hotspot provides a redundant internet connection using cellular data. This ensures connectivity for the meeting even if the primary ISP connection fails.
* Why Not A (Wireless access point): A wireless access point expands Wi-Fi connectivity but does not provide internet redundancy.
* Why Not B (Near-field communication): NFC is used for short-range communication, not internet connectivity.
* Why Not D (Bluetooth): Bluetooth is for short-range device pairing and cannot serve as a backup internet connection.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.7, internet connection types and redundancy.

After resolving the immediate issue (reactivating server credentials), verifying system functionality ensures the solution works as intended and the user can now access the shared drive. This step is a part of the CompTIA troubleshooting methodology:
* Identify the problem.
* Establish a theory of probable cause.
* Test the theory to determine the cause.
* Establish a plan of action.
* Implement the solution.
* Verify full system functionality.
* Document findings, actions, and outcomes.
* Why Not B (Document the findings): Documentation comes after verifying the system works.
* Why Not A (Escalate the issue): Escalation is unnecessary since the problem was resolved.
* Why Not C (Perform backups): Performing backups is unrelated to verifying credential functionality.
CompTIA A+ Exam Reference: Core 2 (220-1102), Section 3.1, troubleshooting methodology.

A PSU (power supply unit) is a component that converts the AC power from the wall outlet into DC power that the PC components can use. A faulty or failing PSU can cause random system crashes, as well as other problems such as noise, overheating, or no power at all. A PSU can fail due to various reasons, such as age, dust, power surges, or poor quality.
To troubleshoot a PSU, the technician can use a multimeter to measure the voltage output of the PSU connectors. The voltage should be within the acceptable range of the specifications. For example, the 12V rail should be between 11.4V and 12.6V. If the voltage is too low or too high, the PSU is likely defective and needs to be replaced.
Alternatively, the technician can try swapping the PSU with a known good one and see if the system crashes persist. If the system works fine with a different PSU, then the original PSU is the problem and should be replaced.
The other options are not likely to fix the random system crashes. Testing the fan speed may help to diagnose overheating issues, but it is not related to the PSU. Disabling the USB ports may help to eliminate potential conflicts with USB devices, but it is not related to the PSU. Decreasing the RAM timings may help to improve performance and stability, but it is not related to the PSU.
Reference:
Fix Random PC Crashes: 10 Steps to Identify and Fix Issues
Why Does Windows Crash? The 9 Most Common Reasons