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CAS-004 Exam - Question 302


A network administrator receives a ticket regarding an error from a remote worker who is trying to reboot a laptop. The laptop has not yet loaded the operating system, and the user is unable to continue the boot process. The administrator is able to provide the user with a recovery PIN, and the user is able to reboot the system and access the device as needed. Which of the following is the MOST likely cause of the error?

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Correct Answer: D

The most likely cause of the error is a failure of TPM authentication. TPM (Trusted Platform Module) is a hardware component used to enhance security by securely storing cryptographic keys used for encryption. In this case, the laptop had not yet loaded the operating system, and the user was unable to continue the boot process until provided with a recovery PIN. This indicates that BitLocker, a disk encryption feature, required the recovery PIN due to an issue with TPM authentication. When TPM authentication fails, BitLocker prompts for a recovery PIN to unlock the drive and proceed with the boot process.

Discussion

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OdinAtlasSteelOption: D
Nov 7, 2023

In this scenario, the fact that the user was able to access the device after using a recovery PIN indicates that there was an issue with the Trusted Platform Module (TPM) authentication. BitLocker, which is often used for disk encryption, relies on the TPM to provide secure and authenticated boot. If there was an issue with TPM authentication, it could prevent the laptop from loading the operating system, leading to the described error. The recovery PIN is typically used to unlock BitLocker-encrypted drives when there's a problem with TPM authentication.

CXSSPOption: D
Sep 17, 2023

D. Failure of TPM authentication In this scenario, the fact that the user is provided with a recovery PIN suggests that the issue is related to TPM (Trusted Platform Module) authentication. The TPM is a specialized chip on the computer's motherboard used to enhance platform security. If the TPM authentication fails, the system may lock access to the encrypted content, requiring the use of a recovery PIN to bypass it. This aligns with the described situation where the laptop has not yet loaded the operating system.

32d799aOption: D
Oct 15, 2023

TPM is a hardware component used for security tasks such as securing the boot process and protecting cryptographic keys

ThatGuyOverThereOption: B
Nov 3, 2023

I'm going with B. Chances are they set the Bitlocker lockout period policy for too long (default 8 hours) and they don't want to wait that long to get back into their system.

b49eb27Option: B
Apr 7, 2024

so if you are using chatgpt to verify this question. mine gave me conflict answers. it told me that it's likely not bitlocker because the os hadn't loaded and then told me that because there was a pin that it was bootloader, all at the same time. Bitlocker can not provide a pin if the OS hasn't loaded. The answer is not B. Chat gpt is not always reliable.

b49eb27
Apr 7, 2024

I accidentally voted B when I meant D

23169fdOption: D
Jul 15, 2024

TPM (Trusted Platform Module) authentication is used by BitLocker to securely store the encryption keys. If the TPM fails to authenticate or if there is an issue with the TPM chip, BitLocker will require a recovery key or PIN to unlock the drive and proceed with the boot process. The need for a recovery PIN indicates that the standard authentication mechanism (usually involving TPM) did not succeed, prompting the user for the recovery information