Badge readers are used to implement secure physical access to a data center. They are used to read the identification information on an employee's badge and grant access to the data center if the employee is authorized2.
This system requires individuals to have an access badge that contains their identification information or a unique code that can be scanned by a reader. After the badge is scanned, the system compares the information on the badge with the authorized personnel database to authenticate if the individual has the required clearance to enter that area. The other options listed, such as a geofence, alarm system, or motion sensor are security measures that may be used in conjunction with badge readers, but do not provide identification and authentication features.

The issue could have been avoided if the developer had used Sandbox testing (Option D), which allows new software to be tested in a controlled environment before implementation. This process ensures that the software does not negatively impact system functionality, like stopping access to critical resources such as file servers.
* End-user acceptance (Option A) ensures that users approve the software, but it wouldn't prevent the issue.
* Staff delegation (Option B) relates to who is responsible but doesn't address testing.
* Appropriate scoping (Option C) helps in defining the extent of changes but does not replace testing.
CompTIA A+ Core 2 References:
* 4.2 - Explain basic change management best practices, including testing in a sandbox environment.

LAN is the most likely option to be impacted in this situation. LAN stands for Local Area Network, and it is a network that connects devices within a limited area, such as a building or a campus. Installing high-definition IP videoconferencing equipment in all classrooms would require a high bandwidth and reliable LAN infrastructure to support the video and audio transmission. The LAN would also need to be configured with proper security, quality of service, and multicast protocols to ensure the optimal performance of the videoconferencing system. SAN, GPU, and PAN are not directly related to this scenario. SAN stands for Storage Area Network, and it is a network that provides access to consolidated storage devices. GPU stands for Graphics Processing Unit, and it is a hardware component that handles graphics rendering and computation. PAN stands for Personal Area Network, and it is a network that connects devices within a short range, such as Bluetooth or infrared. References:
* Official CompTIA learning resources CompTIA A+ Core 1 and Core 2, page 20
* CompTIA A+ Complete Study Guide: Core 1 Exam 220-1101 and Core 2 Exam ..., page 104

Personally Identifiable Information (PII) (Option D) is protected by government regulations. PII includes sensitive data such as names, addresses, social security numbers, and other information that can identify individuals. Various laws, such as GDPR and HIPAA, mandate the protection of PII.
* DRM (Option A) refers to digital rights management, which controls access to digital media.
* EULA (Option B) refers to software licensing agreements.
* PCI (Option C) relates to payment card industry standards for handling cardholder information but is more specific to payment data than general PII.
CompTIA A+ Core 2 References:
* 4.6 - Explain prohibited content and privacy concepts, including the protection of PII.

The best action to protect against unauthorized access of the data on the lost company tablet is to perform a remote wipe on the device. A remote wipe is a feature that allows an administrator or a user to erase all the data and settings on a device remotely, usually through a web portal or an email command. A remote wipe can help prevent the data from being accessed or compromised by anyone who finds or steals the device.
Changing the office's Wi-Fi SSID and password may prevent the device from connecting to the office network but may not prevent the data from being accessed locally or through other networks. Changing the user's password may prevent the device from logging in to the user's account but may not prevent the data from being accessed by other means or accounts. Enabling remote drive encryption may protect the data from being read by unauthorized parties but may not be possible if the device is already lost or turned off.
References: CompTIA A+ Core 2 (220-1002) Certification Exam Objectives Version 4.0, Domain 3.1