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| Section | Weight | Objectives |
|---|---|---|
| Infrastructure Security | 26% | - Design and implement host-based security - AWS Secret Manager and AWS Systems Manager Parameter Store - Design and implement edge security on AWS - Architect network security segmentation (VPC architecture) |
| Identity and Access Management | 20% | - Troubleshoot IAM-based authentication and authorization issues - Design and implement cross-account access management - Design and implement identity and access management architecture - Implement temporary credentials and federation |
| Logging and Monitoring | 20% | - Design and implement log analysis and management - Troubleshoot security monitoring and alerting - Design and implement monitoring and alerting solutions |
| Incident Response | 12% | - Determine root cause and recurrence prevention - Identify, collect, and preserve forensic evidence - Given an AWS security incident, outline the investigation and mitigation steps |
| Data Protection | 22% | - Design and implement encryption solutions for data at rest and in transit - Database encryption and access control - AWS Key Management Service (KMS) and customer managed keys - Amazon S3 security best practices - AWS CloudTrail and encryption key audit |
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NEW QUESTION # 39
A security team manages a company ' s AWS Key Management Service (AWS KMS) customer managed keys. Only members of the security team can administer the KMS keys. The company ' s application team has a software process that needs temporary access to the keys occasionally. The security team needs to provide the application team's software process with access to the keys.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: D
Explanation:
KMS grantsare purpose-built for givingtemporary, scoped permissionsto use a customer managed key without continually editing key policies. A grant can allow only the specific cryptographic operations the application process needs (for example, Encrypt/Decrypt/GenerateDataKey) and can be constrained to a particular AWS principal and (optionally) conditions. When access is no longer required, the security team canrevokethe grant immediately, returning the key to its previous access posture. This meets the "temporary access occasionally" requirement with minimal operational work and lower risk than policy churn.
Option B requires repeated key policy edits and rollbacks, which is operationally noisy and increases the chance of misconfiguration or leaving access in place longer than intended. Option A is not supported in the way described-KMS key material for standard KMS customer managed keys is not something you "export" for sharing, and exposing key material breaks managed key controls. Option D introduces significant overhead and complexity by generating/importing key material repeatedly and is not the intended model for occasional access. Grants are the standard AWS pattern for delegating KMS key usage temporarily and safely.
NEW QUESTION # 40
A company is using AWS Organizations with the default SCP. The company needs to restrict AWS usage for all AWS accounts that are in a specific OU. Except for some desired global services, the AWS usage must occur only in theeu-west-1Region for all accounts in the OU. A security engineer must create an SCP that applies the restriction to existing accounts and any new accounts in the OU.
Which SCP will meet these requirements?
Answer: B
Explanation:
To restrict activity to a single Region in an OU using an SCP, the standard pattern is an explicitDenyfor requests madeoutsidethe allowed Region, while carving out exceptions forglobal servicesthat do not use aws:RequestedRegion in the same way (or that must remain usable regardless of Region). This is done withEffect: Deny, aConditionusing StringNotEquals on aws:RequestedRegion for the allowed Region (here, eu-west-1), andNotActionlisting the global services that should remain available.
This works because SCPs act asguardrails: an explicit Deny in an SCP overrides IAM Allow in member accounts, ensuring the restriction applies consistently to all existing and future accounts placed in the OU. The StringNotEquals condition ensures the deny triggers for any Region other than eu-west-1. The NotAction exception list ensures that the specified global services are not blocked by this deny statement.
NEW QUESTION # 41
A company is building a secure solution that relies on an AWS Key Management Service (AWS KMS) customer managed key. The company wants to allow AWS Lambda to use the KMS key. However, the company wants to prevent Amazon EC2 from using the key.
Which solution will meet these requirements?
Answer: C
Explanation:
AWS KMS access control is primarily enforced through key policies (and optionally grants), and AWS recommends using key policy condition keys to restrict how keys can be used. The kms:ViaService condition key is specifically designed to restrict KMS API usage to requests that come through a particular AWS service endpoint in a specific Region. This is the most robust way to ensure a key can be used only via AWS Lambda (for example, lambda.<region>.amazonaws.com) and not via Amazon EC2 (ec2.<region>.
amazonaws.com), even if IAM permissions exist elsewhere. By writing a key policy that uses the Lambda execution role as the principal and conditions on kms:ViaService, the company can tightly bind key usage to Lambda-originated cryptographic operations while preventing use through EC2 service paths. Option A is weaker because EC2 is not the only way an IAM principal might use KMS, and relying on attaching explicit deny policies broadly is harder to manage and can miss principals. Option C is incorrect because aws:
AuthorizedService is not the typical mechanism for KMS service restriction, and SourceIp is unreliable for service-to-service calls. Option D is not ideal because SCPs do not provide fine-grained service-path restrictions for KMS usage and cannot "allow" beyond IAM; key policy controls still apply.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS KMS Key Policies and Condition Keys
AWS KMS Best Practices for Service-Scoped Key Usage
NEW QUESTION # 42
A company runs ECS services behind an internet-facing ALB that is the origin for CloudFront. An AWS WAF web ACL is associated with CloudFront, but clients can bypass it by accessing the ALB directly. Which solution will prevent direct access to the ALB?
Answer: C
Explanation:
AWS best practices recommend using a shared secret header between CloudFront and ALB origins to prevent direct access. CloudFront injects a custom header, and the ALB listener rules validate its presence.
IP-based controls are brittle due to CloudFront IP changes. PrivateLink and internal ALBs are not supported as CloudFront origins. Header validation is the most reliable and widely recommended pattern.
NEW QUESTION # 43
An application is running on an Amazon EC2 instance that has an IAM role attached. The IAM role provides access to an AWS Key Management Service (AWS KMS) customer managed key and an Amazon S3 bucket. The key is used to access 2 TB of sensitive data that is stored in the S3 bucket. A security engineer discovers a potential vulnerability on the EC2 instance that could result in the compromise of the sensitive data. Due to other critical operations, the security engineer cannot immediately shut down the EC2 instance for vulnerability patching. What is the FASTEST way to prevent the sensitive data from being exposed?
Answer: A
Explanation:
AWS incident response best practices emphasize rapid containment to prevent further data exposure. According to the AWS Certified Security - Specialty Study Guide, the fastest and least disruptive containment method for compromised compute resources is to immediately revoke credentials and permissions rather than modifying data or infrastructure.
Revoking the IAM role's active sessions prevents the EC2 instance from continuing to access AWS services. Updating the S3 bucket policy to explicitly deny access to the IAM role ensures immediate enforcement, even if temporary credentials remain cached. Removing the IAM role from the instance profile further prevents new credentials from being issued.
Option A and D involve large-scale data movement or re-encryption, which is time-consuming and operationally expensive. Option B relies on network-level controls that do not prevent access through private AWS endpoints.
AWS guidance explicitly recommends credential revocation and policy-based denial as the fastest containment step during active incidents.
NEW QUESTION # 44
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