CompTIA Updated 220-1101 Exam Questions and Answers by dorian

The component that should be upgraded first is the RAM. When multiple applications are being utilized, the system’s response time slows down drastically. This is because the computer is running out of memory. Upgrading the RAM will allow the computer to store more data in memory, which will improve performance when multiple applications are being used123.

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​​.

Comprehensive and Detailed In-Depth Explanation:

Ultra HD (UHD), also referred to as 4K UHD, has a resolution of 3840x2160. It's four times the resolution of standard 1080p (Full HD), offering more screen real estate and sharper images.

Option A (1920x1080): Full HD (FHD), not UHD.

Option B (2048x1080): DCI 2K — used in cinema, not common for Ultra HD.

Option D (7680x4320): Known as 8K UHD, not standard Ultra HD.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 1.7: Compare and contrast display technologies and their features.

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In DNS (Domain Name System), the AAAA record is used to map a domain or device to an IPv6 address. IPv6 addresses are 128-bit addresses, and the AAAA record is specifically designed for handling these larger addresses.

C. AAAA: This record is used to associate a hostname with an IPv6 address in DNS.

Why the other options are incorrect:

A. A: An A record maps a domain to an IPv4 address, not an IPv6 address.

B. CNAME: A CNAME (Canonical Name) record is used to alias one domain name to another but does not map to an IP address directly.

D. MX: An MX (Mail Exchange) record is used to direct email traffic to the correct email servers, not to map devices to IP addresses.

This falls under the Networking domain of the CompTIA A+ Core 1 exam​.