CompTIA Updated 220-1101 Exam Questions and Answers by roscoe

Step by Step Detailed Comprehensive Explanation with All CompTIA References:

Analysis of the Problem:

Switching to the 5GHz frequency improves speed but decreases range and penetration through walls compared to 2.4GHz.

Users experience degraded performance likely due to poor coverage at the 5GHz range.

Option Evaluation:

A. Select a different channel: Useful for interference resolution but not coverage improvement. Incorrect.

B. Switch the Wi-Fi back to 2.4GHz frequency: This downgrades the network speed, which isn't a preferred solution. Incorrect.

C. Upgrade the wireless drivers on the users' devices: Unlikely to resolve coverage issues. Incorrect.

D. Add more access points for better coverage: Improves coverage in areas where 5GHz struggles. Correct.

An MX (Mail Exchange) record in DNS specifies the mail server responsible for accepting email messages on behalf of a domain. It is a vital component of the email delivery process, directing email to the correct server based on the domain part of the email address. Without properly configured MX records, a domain's email system cannot function correctly.

When a laptop sometimes fails to charge despite a good power adapter connection, the most likely issue is a defective DC jack. The DC jack, where the power adapter plugs into the laptop, can become loose or damaged over time, leading to intermittent or failed charging. Cooling fan issues, bad memory, or an overheating CPU would typically lead to different symptoms such as overheating, system crashes, or performance issues, not charging problems.

References:

CompTIA A+ Core 1 Exam Objectives Section 3.0: Hardware

RAID 10 (also known as RAID 1+0) combines the features of RAID 1 (mirroring) and RAID 0 (striping) to provide both redundancy and performance enhancements. This configuration requires a minimum of four drives and offers fast data access through striping while ensuring data redundancy through mirroring. RAID 10 is ideal for environments where both data integrity and performance are critical, such as financial databases.