CompTIA 220-1102 - CompTIA A+ Certification Core 2 Exam

Comprehensive and Detailed In-Depth Explanation:

A server room's environment must account for power capacity and circuit breakers to prevent electrical failures.

B. Power distribution unit placement – Important, but circuit breaker capacity is more critical.

C. RAID configurations – Related to data redundancy, not the physical environment.

D. Virtualization – Does not affect server room conditions.

A rollback plan is essential for a change to be approved by a change management review board. It outlines the steps to reverse a change in case something goes wrong, minimizing downtime and mitigating risk. Other items like end-user acceptance and cost analysis are important but not typically the deciding factor for approval.

When an employee is unable to access the company portal using a VPN on their personal smartphone, the most likely cause is:

The smartphone is not enrolled in MDM service: Mobile Device Management (MDM) services often control access to company resources. If the smartphone is not enrolled, it may be blocked from accessing the VPN and, consequently, the company portal.

The application must be purchased by the company: Unlikely, as most VPN applications are free to download or included in the company's software package.

The smartphone is not on the latest OS version: While this could cause compatibility issues, it is less likely than the MDM enrollment issue.

The application fails to install and launch: This would be a different problem and would usually present specific error messages.

Comprehensive and Detailed In-Depth Explanation:

The Programs and Features utility allows users to view, modify, or uninstall applications that may be consuming excessive disk space. This is the best option when addressing low disk space issues.

A. Internet Options – Incorrect. This controls browser settings and has no impact on disk space.

B. System – Incorrect. System settings provide general system information but do not manage disk space.

D. Device Manager – Incorrect. Device Manager is used for managing hardware devices, not disk space.

Additional Troubleshooting Steps:

Use Disk Cleanup to remove temporary files.

Check the Downloads folder and delete unused files.

Move data to external or cloud storage.

To configure a new SSD, the technician would use diskmgmt.msc (Disk Management) and diskpart.msc (Diskpart). These tools allow for partitioning, formatting, and managing the SSD. Disk Management is a graphical utility that provides easy access to these tasks, while Diskpart is a command-line tool with advanced features for disk configuration.

Diskmgmt.msc: A GUI-based tool used to manage disk partitions.

Diskpart.msc: A command-line utility used for advanced disk configuration.

The technician should disconnect the computer from the network (Option A) first to prevent any further spread of the infection or data loss. Once the machine is isolated from the network, the technician can safely investigate the malware without risking infection to other systems.

Running an antivirus scan (Option B) comes after isolating the system.

Rebooting the computer (Option C) could lead to the loss of critical information or make it harder to diagnose the issue.

Educating the user (Option D) is important but should happen after resolving the immediate issue.

CompTIA A+ Core 2 References:

3.3 - Best practices for malware removal, including isolating the system first​.

Comprehensive and Detailed In-Depth Explanation:

If an MDM (Mobile Device Management) solution detects unauthorized applications, it is likely that the user has rooted (Android) or jailbroken (iOS) the device to bypass security restrictions. Root access allows the user to install unauthorized applications that MDM policies would normally block.

B. Upgraded the OS – Incorrect. Upgrading the OS does not bypass security policies or allow unauthorized apps.

C. Installed a VPN – Incorrect. A VPN does not affect the MDM system or allow unauthorized apps.

D. Uninstalled the MDM software – Incorrect. If the MDM software was removed, the device would not still be reporting to the MDM server.

Refreshing local Windows Server Update Services (WSUS) settings and deleting the Windows Update cache are effective steps in resolving issues with Windows 10 not installing updates. These actions help in rectifying any corrupt update files and ensuring that the workstation is properly communicating with the update servers, which can resolve errors during manual and automatic update installations.

To enable contactless payment, NFC (Near Field Communication) (Option C) needs to be enabled. NFC is the technology used in most mobile payment systems to enable close-range communication between the phone and a payment terminal.

Wi-Fi (Option A) and Bluetooth (Option D) are unrelated to contactless payments.

Nearby share (Option B) is a file-sharing feature, not a payment technology.

CompTIA A+ Core 2 References:

2.7 - Explain common mobile device security settings, including enabling NFC for mobile payments​.

To confirm whether a network printer has connectivity issues, the technician should use:

ping: This command checks the connectivity to the printer by sending packets and measuring the response time. It helps determine if the printer is reachable on the network.

netstat: Provides statistics and current network connections but does not directly confirm connectivity to a specific device.

net: Used for network resources management but not specifically for checking connectivity.

nslookup: Used for querying DNS to obtain domain name or IP address mapping, not for checking connectivity.

For ensuring data protection against local natural disasters and hardware failures, the best approach is to use an off-site solution that provides redundancy and is resilient to local disruptions.

Using an agent-based cloud backup solution: This method involves backing up data to a remote cloud server, providing protection against local disasters like floods, fires, or hardware failures since the data is stored off-site and can be accessed from anywhere.

Implementing a grandfather-father-son backup rotation: While effective for managing local backups, this method typically involves physical media which could still be vulnerable to local disasters.

Automating backups to a local network share: This keeps the backups within the same physical location, making them susceptible to local disasters.

Saving files manually to an external drive: This method is prone to human error and doesn't provide automated or off-site protection.