2024 Latest CAS-005 dumps - Instant Download PDF [Q15-Q35]

2024 Latest CAS-005 dumps - Instant Download PDF

Updated Verified CAS-005 Downloadable Printable Exam Dumps

NEW QUESTION # 15
Audit findings indicate several user endpoints are not utilizing full disk encryption During me remediation process, a compliance analyst reviews the testing details for the endpoints and notes the endpoint device configuration does not support full disk encryption Which of the following is the most likely reason me device must be replaced'

• A. The HSM is vulnerable to common exploits and a firmware upgrade is needed
• B. The motherboard was not configured with a TPM from the OEM supplier.
• C. The vTPM was not properly initialized and is corrupt.
• D. The HSM does not support sealing storage
• E. The HSM is outdated and no longer supported by the manufacturer

Answer: B

Explanation:
The most likely reason the device must be replaced is that the motherboard was not configured with a TPM (Trusted Platform Module) from the OEM (Original Equipment Manufacturer) supplier.
Why TPM is Necessary for Full Disk Encryption:
* Hardware-Based Security: TPM provides a hardware-based mechanism to store encryption keys securely, which is essential for full disk encryption.
* Compatibility: Full disk encryption solutions, such as BitLocker, require TPM to ensure that the encryption keys are securely stored and managed.
* Integrity Checks: TPM enables system integrity checks during boot, ensuring that the device has not been tampered with.
Other options do not directly address the requirement for TPM in supporting full disk encryption:
* A. The HSM is outdated: While HSM (Hardware Security Module) is important for security, it is not typically used for full disk encryption.
* B. The vTPM was not properly initialized: vTPM (virtual TPM) is less common and not typically a reason for requiring hardware replacement.
* C. The HSM is vulnerable to common exploits: This would require a firmware upgrade, not replacement of the device.
* E. The HSM does not support sealing storage: Sealing storage is relevant but not the primary reason for requiring TPM for full disk encryption.
References:
* CompTIA SecurityX Study Guide
* "Trusted Platform Module (TPM) Overview," Microsoft Documentation
* "BitLocker Deployment Guide," Microsoft Documentation

NEW QUESTION # 16
A company detects suspicious activity associated with external connections Security detection tools are unable to categorize this activity. Which of the following is the best solution to help the company overcome this challenge?

• A. Monitor the dark web
• B. implement UEBA
• C. Map network traffic to known loCs.
• D. Implement an Interactive honeypot

Answer: B

Explanation:
User and Entity Behavior Analytics (UEBA) is the best solution to help the company overcome challenges associated with suspicious activity that cannot be categorized by traditional detection tools. UEBA uses advanced analytics to establish baselines of normal behavior for users and entities within the network. It then identifies deviations from these baselines, which may indicate malicious activity. This approach is particularly effective for detecting unknown threats and sophisticated attacks that do not match known indicators of compromise (IoCs).

NEW QUESTION # 17
After an incident occurred, a team reported during the lessons-learned review that the team.
* Lost important Information for further analysis.
* Did not utilize the chain of communication
* Did not follow the right steps for a proper response
Which of the following solutions is the best way to address these findinds?

• A. Building playbooks for different scenarios and performing regular table-top exercises
• B. Requiring professional incident response certifications tor each new team member
• C. Publishing the incident response policy and enforcing it as part of the security awareness program
• D. Requesting budget for better forensic tools to Improve technical capabilities for Incident response operations

Answer: A

Explanation:
Building playbooks for different scenarios and performing regular table-top exercises directly addresses the issues identified in the lessons-learned review. Here's why:
* Lost important information for further analysis: Playbooks outline step-by-step procedures for incident response, ensuring that team members know exactly what to document and how to preserve evidence.
* Did not utilize the chain of communication: Playbooks include communication protocols, specifying who to notify and when. Regular table-top exercises reinforce these communication channels, ensuring they are followed during actual incidents.
* Did not follow the right steps for a proper response: Playbooks provide a clear sequence of actions to be taken during various types of incidents, helping the team to respond in a structured and effective manner. Regular exercises allow the team to practice these steps, identifying and correcting any deviations from the plan.
Investing in better forensic tools (Option A) or requiring certifications (Option C) are also valuable, but they do not directly address the procedural and communication gaps identified. Publishing and enforcing the incident response policy (Option D) is important but not as practical and hands-on as playbooks and exercises in ensuring the team is prepared.
References:
* CompTIA Security+ Study Guide
* NIST SP 800-61 Rev. 2, "Computer Security Incident Handling Guide"
* SANS Institute, "Incident Handler's Handbook"

NEW QUESTION # 18
A security analyst received a notification from a cloud service provider regarding an attack detected on a web server The cloud service provider shared the following information about the attack:
* The attack came from inside the network.
* The attacking source IP was from the internal vulnerability scanners.
* The scanner is not configured to target the cloud servers.
Which of the following actions should the security analyst take first?

• A. Set network behavior analysis rules
• B. Configure the scan policy to avoid targeting an out-of-scope host
• C. Create an allow list for the vulnerability scanner IPs m order to avoid false positives
• D. Quarantine the scanner sensor to perform a forensic analysis

Answer: D

Explanation:
When a security analyst receives a notification about an attack that appears to originate from an internal vulnerability scanner, it suggests that the scanner itself might have been compromised. This situation is critical because a compromised scanner can potentially conduct unauthorized scans, leak sensitive information, or execute malicious actions within the network. The appropriate first action involves containing the threat to prevent further damage and allow for a thorough investigation.
Here's why quarantining the scanner sensor is the best immediate action:
* Containment and Isolation: Quarantining the scanner will immediately prevent it from continuing any malicious activity or scans. This containment is crucial to protect the rest of the network from potential harm.
* Forensic Analysis: By isolating the scanner, a forensic analysis can be performed to understand how it was compromised, what actions it took, and what data or systems might have been affected. This analysis will provide valuable insights into the nature of the attack and help in taking appropriate remedial actions.
* Preventing Further Attacks: If the scanner is allowed to continue operating, it might execute more unauthorized actions, leading to greater damage. Quarantine ensures that the threat is neutralized promptly.
* Root Cause Identification: A forensic analysis can help identify vulnerabilities in the scanner's configuration, software, or underlying system that allowed the compromise. This information is essential for preventing future incidents.
Other options, while potentially useful in the long term, are not appropriate as immediate actions in this scenario:
* A. Create an allow list for the vulnerability scanner IPs to avoid false positives: This action addresses false positives but does not mitigate the immediate threat posed by the compromised scanner.
* B. Configure the scan policy to avoid targeting an out-of-scope host: This step is preventive for future scans but does not deal with the current incident where the scanner is already compromised.
* C. Set network behavior analysis rules: While useful for ongoing monitoring and detection, this does not address the immediate need to stop the compromised scanner's activities.
In conclusion, the first and most crucial action is to quarantine the scanner sensor to halt any malicious activity and perform a forensic analysis to understand the scope and nature of the compromise. This step ensures that the threat is contained and provides a basis for further remediation efforts.
References:
* CompTIA SecurityX Study Guide
* NIST Special Publication 800-61 Revision 2, "Computer Security Incident Handling Guide"

NEW QUESTION # 19
A company's security policy states that any publicly available server must be patched within 12 hours after a patch is released A recent llS zero-day vulnerability was discovered that affects all versions of the Windows Server OS:

Which of the following hosts should a security analyst patch first once a patch is available?

• A. 0
• B. 1
• C. 2
• D. 3
• E. 4
• F. 5

Answer: E

Explanation:
Based on the security policy that any publicly available server must be patched within 12 hours after a patch is released, the security analyst should patch Host 1 first. Here's why:
* Public Availability: Host 1 is externally available, making it accessible from the internet. Publicly available servers are at higher risk of being targeted by attackers, especially when a zero-day vulnerability is known.
* Exposure to Threats: Host 1 has IIS installed and is publicly accessible, increasing its exposure to potential exploitation. Patching this host first reduces the risk of a successful attack.
* Prioritization of Critical Assets: According to best practices, assets that are exposed to higher risks should be prioritized for patching to mitigate potential threats promptly.
* References:
* CompTIA Security+ SY0-601 Study Guide by Mike Chapple and David Seidl
* NIST Special Publication 800-40: Guide to Enterprise Patch Management Technologies
* CIS Controls: Control 3 - Continuous Vulnerability Management

NEW QUESTION # 20
A systems administrator wants to introduce a newly released feature for an internal application. The administrate docs not want to test the feature in the production environment. Which of the following locations is the best place to test the new feature?

• A. Staging environment
• B. CI/CO pipeline
• C. Development environment
• D. Testing environment

Answer: A

NEW QUESTION # 21
A security officer received several complaints from users about excessive MPA push notifications at night The security team investigates and suspects malicious activities regarding user account authentication Which of the following is the best way for the security officer to restrict MI~A notifications''

• A. Provisioning FID02 devices
• B. Deploying a text message based on MFA
• C. Configuring prompt-driven MFA
• D. Enabling OTP via email

Answer: C

Explanation:
Excessive MFA push notifications can be a sign of an attempted push notification attack, where attackers repeatedly send MFA prompts hoping the user will eventually approve one by mistake. To mitigate this:
* A. Provisioning FIDO2 devices: While FIDO2 devices offer strong authentication, they may not be practical for all users and do not directly address the issue of excessive push notifications.
* B. Deploying a text message-based MFA: SMS-based MFA can still be vulnerable to similar spamming attacks and phishing.
* C. Enabling OTP via email: Email-based OTPs add another layer of security but do not directly solve the issue of excessive notifications.
* D. Configuring prompt-driven MFA: This option allows users to respond to prompts in a secure manner, often including features like time-limited approval windows, additional verification steps, or requiring specific actions to approve. This can help prevent users from accidentally approving malicious attempts.
Configuring prompt-driven MFA is the best solution to restrict unnecessary MFA notifications and improve security.
References:
* CompTIA Security+ Study Guide
* NIST SP 800-63B, "Digital Identity Guidelines"
* "Multi-Factor Authentication: Best Practices" by Microsoft

NEW QUESTION # 22
Which of the following best explains the business requirement a healthcare provider fulfills by encrypting patient data at rest?

• A. Providing for non-repudiation data
• B. Securing data transfer between hospitals
• C. Protecting privacy while supporting portability.
• D. Reducing liability from identity theft

Answer: C

Explanation:
Encrypting patient data at rest is a critical requirement for healthcare providers to ensure compliance with regulations such as the Health Insurance Portability and Accountability Act (HIPAA). The primary business requirement fulfilled by this practice is the protection of patient privacy while supporting the portability of medical information. By encrypting data at rest, healthcare providers safeguard sensitive patient information from unauthorized access, ensuring that privacy is maintained even if the storage media are compromised.
Additionally, encryption supports the portability of patient records, allowing for secure transfer and access across different systems and locations while ensuring that privacy controls are in place.
References:
* CompTIA SecurityX Study Guide: Emphasizes the importance of data encryption for protecting sensitive information and ensuring compliance with regulatory requirements.
* HIPAA Security Rule: Requires healthcare providers to implement safeguards, including encryption, to protect patient data.
* "Health Informatics: Practical Guide for Healthcare and Information Technology Professionals" by Robert E. Hoyt: Discusses encryption as a key measure for protecting patient data privacy and supporting data portability.

NEW QUESTION # 23
Company A and Company D ate merging Company A's compliance reports indicate branch protections are not in place A security analyst needs to ensure that potential threats to the software development life cycle are addressed. Which of the following should me analyst cons<der when completing this basic?

• A. If role-based training is deployed
• B. If DAST code is being stored to a single code repository
• C. If developers are unable to promote to production
• D. If DAST scans are routinely scheduled

Answer: D

Explanation:
Dynamic Application Security Testing (DAST) is crucial for identifying and addressing security vulnerabilities during the software development life cycle (SDLC). Ensuring that DAST scans are routinely scheduled helps in maintaining a secure development process.
Why Routine DAST Scans?
* Continuous Security Assessment: Regular DAST scans help in identifying vulnerabilities in real-time, ensuring they are addressed promptly.
* Compliance: Routine scans ensure that the development process complies with security standards and regulations.
* Proactive Threat Mitigation: Regular scans help in early detection and mitigation of potential security threats, reducing the risk of breaches.
* Integration into SDLC: Ensures security is embedded within the development process, promoting a security-first approach.
Other options, while relevant, do not directly address the continuous assessment and proactive identification of threats:
* A. If developers are unable to promote to production: This is more of an operational issue than a security assessment.
* B. If DAST code is being stored to a single code repository: This concerns code management rather than security testing frequency.
* D. If role-based training is deployed: While important, training alone does not ensure continuous security assessment.
References:
* CompTIA SecurityX Study Guide
* OWASP Testing Guide
* NIST Special Publication 800-53, "Security and Privacy Controls for Information Systems and Organizations"

NEW QUESTION # 24

An organization is planning for disaster recovery and continuity of operations.
INSTRUCTIONS
Review the following scenarios and instructions. Match each relevant finding to the affected host.
After associating scenario 3 with the appropriate host(s), click the host to select the appropriate corrective action for that finding.
Each finding may be used more than once.
If at any time you would like to bring back the initial state of the simul-ation, please click the Reset All button.

Answer:

Explanation:

Explanation:
A computer screen shot of a diagram Description automatically generated

A screenshot of a computer error Description automatically generated

NEW QUESTION # 25
A systems administrator wants to introduce a newly released feature for an internal application. The administrate docs not want to test the feature in the production environment. Which of the following locations is the best place to test the new feature?

• A. Staging environment
• B. CI/CO pipeline
• C. Development environment
• D. Testing environment

Answer: A

Explanation:
The best location to test a newly released feature for an internal application, without affecting the production environment, is the staging environment. Here's a detailed explanation:
* Staging Environment: This environment closely mirrors the production environment in terms of hardware, software, configurations, and settings. It serves as a final testing ground before deploying changes to production. Testing in the staging environment ensures that the new feature will behave as expected in the actual production setup.
* Isolation from Production: The staging environment is isolated from production, which means any issues arising from the new feature will not impact the live users or the integrity of the production data.
This aligns with best practices in change management and risk mitigation.
* Realistic Testing: Since the staging environment replicates the production environment, it provides realistic testing conditions. This helps in identifying potential issues that might not be apparent in a development or testing environment, which often have different configurations and workloads.
* References:
* CompTIA Security+ SY0-601 Official Study Guide by Quentin Docter, Jon Buhagiar
* NIST Special Publication 800-53: Security and Privacy Controls for Information Systems and Organizations

NEW QUESTION # 26
A cybersecurity architect is reviewing the detection and monitoring capabilities for a global company that recently made multiple acquisitions. The architect discovers that the acquired companies use different vendors for detection and monitoring The architect's goal is to:
* Create a collection of use cases to help detect known threats
* Include those use cases in a centralized library for use across all of the companies Which of the following is the best way to achieve this goal?

• A. Sigma rules
• B. Ariel Query Language
• C. TAXII/STIX library
• D. UBA rules and use cases

Answer: A

Explanation:
To create a collection of use cases for detecting known threats and include them in a centralized library for use across multiple companies with different vendors, Sigma rules are the best option. Here's why:
* Vendor-Agnostic Format: Sigma rules are a generic and open standard for writing SIEM (Security Information and Event Management) rules. They can be translated to specific query languages of different SIEM systems, making them highly versatile and applicable across various platforms.
* Centralized Rule Management: By using Sigma rules, the cybersecurity architect can create a centralized library of detection rules that can be easily shared and implemented across different detection and monitoring systems used by the acquired companies. This ensures consistency in threat detection capabilities.
* Ease of Use and Flexibility: Sigma provides a structured and straightforward format for defining detection logic. It allows for the easy creation, modification, and sharing of rules, facilitating collaboration and standardization across the organization.

NEW QUESTION # 27
All organization is concerned about insider threats from employees who have individual access to encrypted material. Which of the following techniques best addresses this issue?

• A. Account federation with hardware tokens
• B. SSO with MFA
• C. Key splitting
• D. Sating and hashing
• E. SAE

Answer: C

Explanation:
The technique that best addresses the issue of insider threats from employees who have individual access to encrypted material is key splitting. Here's why:
* Key Splitting: Key splitting involves dividing a cryptographic key into multiple parts and distributing these parts among different individuals or systems. This ensures that no single individual has complete access to the key, thereby mitigating the risk of insider threats.
* Increased Security: By requiring multiple parties to combine their key parts to access encrypted material, key splitting provides an additional layer of security. This approach is particularly useful in environments where sensitive data needs to be protected from unauthorized access by insiders.
* Compliance and Best Practices: Key splitting aligns with best practices and regulatory requirements for handling sensitive information, ensuring that access is tightly controlled and monitored.
* References:
* CompTIA Security+ SY0-601 Study Guide by Mike Chapple and David Seidl
* NIST Special Publication 800-57: Recommendation for Key Management
* ISO/IEC 27002:2013: Information Technology - Security Techniques - Code of Practice for Information Security Controls By employing key splitting, organizations can effectively reduce the risk of insider threats and enhance the overall security of encrypted material.

NEW QUESTION # 28
A security engineer wants to reduce the attack surface of a public-facing containerized application Which of the following will best reduce the application's privilege escalation attack surface?

• A. Running the container in an isolated network and placing a load balancer in a public-facing network.Adding the following ACL to the load balancer:PZRKZI HTTES from 0-0.0.0.0/0 pert 443
• B. Installing an EDR on the container's host with reporting configured to log to a centralized SIFM and Implementing the following alerting rules TF PBOCESS_USEB=rooC ALERT_TYPE=critical
• C. Designing a muiticontainer solution, with one set of containers that runs the mam application, and another set oi containers that perform automatic remediation by replacing compromised containers or disabling compromised accounts
• D. Implementing the following commands in the Dockerfile:
  RUN echo user:x:1000:1000iuser:/home/user:/dew/null > /ete/passwd

Answer: D

Explanation:
Implementing the given commands in the Dockerfile ensures that the container runs with non-root user privileges. Running applications as a non-root user reduces the risk of privilege escalation attacks because even if an attacker compromises the application, they would have limited privileges and would not be able to perform actions that require root access.
* A. Implementing the following commands in the Dockerfile: This directly addresses the privilege escalation attack surface by ensuring the application does not run with elevated privileges.
* B. Installing an EDR on the container's host: While useful for detecting threats, this does not reduce the privilege escalation attack surface within the containerized application.
* C. Designing a multi-container solution: While beneficial for modularity and remediation, it does not specifically address privilege escalation.
* D. Running the container in an isolated network: This improves network security but does not directly reduce the privilege escalation attack surface.
References:
* CompTIA Security+ Study Guide
* Docker documentation on security best practices
* NIST SP 800-190, "Application Container Security Guide"

NEW QUESTION # 29
An organization is implementing Zero Trust architecture A systems administrator must increase the effectiveness of the organization's context-aware access system. Which of the following is the best way to improve the effectiveness of the system?

• A. Accurate asset inventory
• B. Secure zone architecture
• C. Always-on VPN
• D. Microsegmentation

Answer: D

Explanation:
Microsegmentation is a critical strategy within Zero Trust architecture that enhances context-aware access systems by dividing the network into smaller, isolated segments. This reduces the attack surface and limits lateral movement of attackers within the network. It ensures that even if one segment is compromised, the attacker cannot easily access other segments. This granular approach to network security is essential for enforcing strict access controls and monitoring within Zero Trust environments.

NEW QUESTION # 30
The identity and access management team is sending logs to the SIEM for continuous monitoring. The deployed log collector is forwarding logs to the SIEM. However, only false positive alerts are being generated. Which of the following is the most likely reason for the inaccurate alerts?

• A. The data is not being properly parsed
• B. The retention policy is not property configured
• C. The compute resources are insufficient to support the SIEM
• D. The SIEM indexes are 100 large

Answer: A

Explanation:
Proper parsing of data is crucial for the SIEM to accurately interpret and analyze the logs being forwarded by the log collector. If the data is not parsed correctly, the SIEM may misinterpret the logs, leading to false positives and inaccurate alerts. Ensuring that the log data is correctly parsed allows the SIEM to correlate and analyze the logs effectively, which is essential for accurate alerting and monitoring.

NEW QUESTION # 31
A cloud engineer needs to identify appropriate solutions to:
* Provide secure access to internal and external cloud resources.
* Eliminate split-tunnel traffic flows.
* Enable identity and access management capabilities.
Which of the following solutions arc the most appropriate? (Select two).

• A. SASE
• B. Federation
• C. SD-WAN
• D. CASB
• E. Microsegmentation
• F. PAM

Answer: A,D

Explanation:
To provide secure access to internal and external cloud resources, eliminate split-tunnel traffic flows, and enable identity and access management capabilities, the most appropriate solutions are CASB (Cloud Access Security Broker) and SASE (Secure Access Service Edge).
Why CASB and SASE?
* CASB (Cloud Access Security Broker):
* Secure Access: CASB solutions provide secure access to cloud resources by enforcing security policies and monitoring user activities.
* Identity and Access Management: CASBs integrate with identity and access management (IAM) systems to ensure that only authorized users can access cloud resources.
* Visibility and Control: They offer visibility into cloud application usage and control over data sharing and access.
* SASE (Secure Access Service Edge):
* Eliminate Split-Tunnel Traffic: SASE integrates network security functions with WAN capabilities to ensure secure access without the need for split-tunnel configurations.
* Comprehensive Security: SASE provides a holistic security approach, including secure web gateways, firewalls, and zero trust network access (ZTNA).
* Identity-Based Access: SASE leverages IAM to enforce access controls based on user identity and context.
Other options, while useful, do not comprehensively address all the requirements:
* A. Federation: Useful for identity management but does not eliminate split-tunnel traffic or provide comprehensive security.
* B. Microsegmentation: Enhances security within the network but does not directly address secure access to cloud resources or split-tunnel traffic.
* D. PAM (Privileged Access Management): Focuses on managing privileged accounts and does not provide comprehensive access control for internal and external resources.
* E. SD-WAN: Enhances WAN performance but does not inherently provide the identity and access management capabilities or eliminate split-tunnel traffic.
References:
* CompTIA SecurityX Study Guide
* "CASB: Cloud Access Security Broker," Gartner Research

NEW QUESTION # 32
A company isolated its OT systems from other areas of the corporate network These systems are required to report usage information over the internet to the vendor Which oi the following b*st reduces the risk of compromise or sabotage' (Select two).

• A. Performing boot Integrity checks
• B. Monitoring network behavior
• C. Implementing a site-to-site IPSec VPN
• D. Implementing allow lists
• E. Encrypting data at rest
• F. Executing daily health checks

Answer: C,D

Explanation:
* A. Implementing allow lists: Allow lists (whitelisting) restrict network communication to only authorized devices and applications, significantly reducing the attack surface by ensuring that only pre-approved traffic is permitted.
* F. Implementing a site-to-site IPSec VPN: A site-to-site VPN provides a secure, encrypted tunnel for data transmission between the OT systems and the vendor, protecting the data from interception and tampering during transit.
Other options:
* B. Monitoring network behavior: While useful for detecting anomalies, it does not proactively reduce the risk of compromise or sabotage.
* C. Encrypting data at rest: Important for protecting data stored on devices, but does not address network communication risks.
* D. Performing boot integrity checks: Ensures the integrity of the system at startup but does not protect ongoing network communications.
* E. Executing daily health checks: Useful for maintaining system health but does not directly reduce the risk of network-based compromise or sabotage.
References:
* CompTIA Security+ Study Guide
* NIST SP 800-82, "Guide to Industrial Control Systems (ICS) Security"
* "Industrial Network Security" by Eric D. Knapp and Joel Thomas Langill

NEW QUESTION # 33
A company that relies on an COL system must keep it operating until a new solution is available Which of the following is the most secure way to meet this goal?

• A. Enforcing strong credentials and improving monitoring capabilities
• B. Isolating the system and enforcing firewall rules to allow access to only required endpoints
• C. Placing the system in a screened subnet and blocking access from internal resources
• D. Restricting system access to perform necessary maintenance by the IT team

Answer: B

Explanation:
To ensure the most secure way of keeping a legacy system (COL) operating until a new solution is available, isolating the system and enforcing strict firewall rules is the best approach. This method minimizes the attack surface by restricting access to only the necessary endpoints, thereby reducing the risk of unauthorized access and potential security breaches. Isolating the system ensures that it is not exposed to the broader network, while firewall rules control the traffic that can reach the system, providing a secure environment until a replacement is implemented.
References:
* CompTIA SecurityX Study Guide: Recommends network isolation and firewall rules as effective measures for securing legacy systems.
* NIST Special Publication 800-82, "Guide to Industrial Control Systems (ICS) Security": Advises on isolating critical systems and using firewalls to control access.
* "Network Security Assessment" by Chris McNab: Discusses techniques for isolating systems and enforcing firewall rules to protect vulnerable or legacy systems.
By isolating the system and implementing strict firewall controls, the organization can maintain the necessary operations securely while working on deploying a new solution.

NEW QUESTION # 34
Emails that the marketing department is sending to customers are pomp to the customers' spam folders. The security team is investigating the issue and discovers that the certificates used by the email server were reissued, but DNS records had not been updated. Which of the following should the security team update in order to fix this issue? (Select three.)

• A. SOA
• B. SASC
• C. DNSSEC
• D. SPF
• E. DMARC
• F. DKIM
• G. MX
• H. SAN

Answer: D,E,F

Explanation:
To prevent emails from being marked as spam, several DNS records related to email authentication need to be properly configured and updated when there are changes to the email server's certificates:
* A. DMARC (Domain-based Message Authentication, Reporting & Conformance): DMARC records help email servers determine how to handle messages that fail SPF or DKIM checks, improving email deliverability and reducing the likelihood of emails being marked as spam.
* B. SPF (Sender Policy Framework): SPF records specify which mail servers are authorized to send email on behalf of your domain. Updating the SPF record ensures that the new email server is recognized as an authorized sender.
* C. DKIM (DomainKeys Identified Mail): DKIM adds a digital signature to email headers, allowing the receiving server to verify that the email has not been tampered with and is from an authorized sender. Updating DKIM records ensures that emails are properly signed and authenticated.
* D. DNSSEC (Domain Name System Security Extensions): DNSSEC adds security to DNS by enabling DNS responses to be verified. While important for DNS security, it does not directly address the issue of emails being marked as spam.
* E. SASC: This is not a relevant standard for this scenario.
* F. SAN (Subject Alternative Name): SAN is used in SSL/TLS certificates for securing multiple domain names, not for email delivery issues.
* G. SOA (Start of Authority): SOA records are used for DNS zone administration and do not directly impact email deliverability.
* H. MX (Mail Exchange): MX records specify the mail servers responsible for receiving email on behalf of a domain. While important, the primary issue here is the authentication of outgoing emails, which is handled by SPF, DKIM, and DMARC.
References:
* CompTIA Security+ Study Guide
* RFC 7208 (SPF), RFC 6376 (DKIM), and RFC 7489 (DMARC)
* NIST SP 800-45, "Guidelines on Electronic Mail Security"

NEW QUESTION # 35
......

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