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Amazon SCS-C03 Exam Syllabus Topics:

Topic	Details
Topic 1	Data Protection: This domain centers on protecting data at rest and in transit through encryption, key management, data classification, secure storage, and backup mechanisms.
Topic 2	Security Foundations and Governance: This domain addresses foundational security practices including policies, compliance frameworks, risk management, security automation, and audit procedures for AWS environments.
Topic 3	Infrastructure Security: This domain focuses on securing AWS infrastructure including networks, compute resources, and edge services through secure architectures, protection mechanisms, and hardened configurations.

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Amazon AWS Certified Security - Specialty Sample Questions (Q124-Q129):

NEW QUESTION # 124
A company runs a global ecommerce website using Amazon CloudFront. The company must block traffic from specific countries to comply with data regulations.
Which solution will meet these requirements MOST cost-effectively?

A. Use AWS WAF IP match rules.
B. Use geolocation headers in CloudFront.
C. Use CloudFront geo restriction to deny the countries.
D. Use AWS WAF geo match rules.

Answer: C

Explanation:
Amazon CloudFront includes a built-in geo restriction feature that allows content to be allowed or denied based on the viewer's country. According to AWS Certified Security - Specialty documentation, CloudFront geo restriction is the most cost-effective method for country-based blocking because it does not require AWS WAF or additional rule processing.
AWS WAF geo match rules incur additional cost and are more appropriate when advanced inspection or layered security controls are required. IP-based blocking is impractical due to frequent IP changes.
Geolocation headers do not enforce access control.
CloudFront geo restriction is evaluated at the edge and efficiently blocks disallowed countries with minimal latency and cost.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
Amazon CloudFront Geo Restriction
AWS Edge Security Best Practices

NEW QUESTION # 125
A company is operating an open-source software platform that is internet facing. The legacy software platform no longer receives security updates. The software platform operates using Amazon Route 53 weighted load balancing to send traffic to two Amazon EC2 instances that connect to an Amazon RDS cluster. A recent report suggests this software platform is vulnerable to SQL injection attacks, with samples of attacks provided. The company's security engineer must secure this system against SQL injection attacks within 24 hours. The solution must involve the least amount of effort and maintain normal operations during implementation.
What should the security engineer do to meet these requirements?

A. Obtain the latest source code for the platform and make the necessary updates. Test the updated code to ensure that the vulnerability has been mitigated, then deploy the patched version of the platform to the EC2 instances.
B. Update the security group that is attached to the EC2 instances, removing access from the internet to the TCP port used by the SQL database. Create an AWS WAF web ACL containing rules that protect the application from this attack, then apply it to the EC2 instances.
C. Create an Application Load Balancer with the existing EC2 instances as a target group. Create an AWS WAF web ACL containing rules that protect the application from this attack, then apply it to the ALB.
Test to ensure the vulnerability has been mitigated, then redirect the Route 53 records to point to the ALB. Update security groups on the EC2 instances to prevent direct access from the internet.
D. Create an Amazon CloudFront distribution specifying one EC2 instance as an origin. Create an AWS WAF web ACL containing rules that protect the application from this attack, then apply it to the distribution. Test to ensure the vulnerability has been mitigated, then redirect the Route 53 records to point to CloudFront.

Answer: C

Explanation:
AWS WAF provides managed and custom rules that can immediately mitigate common web exploits such as SQL injection without modifying application code. According to AWS Certified Security - Specialty documentation, placing AWS WAF in front of an Application Load Balancer is a recommended rapid- response control for legacy applications with known vulnerabilities.
Creating an ALB in front of the existing EC2 instances allows seamless traffic migration. AWS WAF SQL injection rules can be deployed and tested without downtime. Updating Route 53 to point to the ALB preserves normal operations. Restricting EC2 security groups afterward prevents bypassing the WAF.
Option B introduces CloudFront changes and single-origin testing, increasing complexity. Option C cannot be completed within 24 hours and risks downtime. Option D is invalid because AWS WAF cannot be attached directly to EC2 instances.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS WAF Web ACL Architecture
AWS Application Load Balancer Security

NEW QUESTION # 126
A corporate cloud security policy states that communications between the company ' s VPC and KMS must travel entirely within the AWS network and not use public service endpoints.
Which combination of the following actions MOST satisfies this requirement? (Select TWO.)

A. Use the KMS Import Key feature to securely transfer the AWS KMS key over a VPN.
B. Add the following condition to the AWS KMS key policy: " aws:SourceIp " : " 10.0.0.0/16 " .
C. Remove the VPC internet gateway from the VPC and add a virtual private gateway to the VPC to prevent direct, public internet connectivity.
D. Add theaws:sourceVpcecondition to the AWS KMS key policy referencing the company ' s VPC endpoint ID.
E. Create a VPC endpoint for AWS KMS withprivate DNS enabled.

Answer: D,E

Explanation:
To ensure traffic from a VPC to AWS KMS stays on the AWS network and does not use public endpoints, you should use aninterface VPC endpoint (AWS PrivateLink) for KMS. Creating aVPC endpoint for KMS with private DNS enabled(Option C) causes standard KMS DNS names (for example, kms. < region > .
amazonaws.com) to resolve to theprivateendpoint IPs inside the VPC, routing requests over the AWS private network rather than through the internet. This is the core networking control that satisfies "no public service endpoints." To enforce that only calls that come through the intended VPC endpoint can use the key, add an authorization guardrail in theKMS key policyusing the aws:sourceVpce condition (Option A). This ensures that even if a principal has credentials, KMS will deny usage unless the request is made via the specified VPC endpoint, preventing accidental or malicious use over public paths.
Option B is neither necessary nor sufficient: removing an internet gateway does not prevent all public endpoint use (NAT, other egress paths, or other VPCs could still be involved) and can break workloads.
Option D is unrelated to runtime KMS API traffic. Option E is weaker because SourceIp checks can be bypassed via other AWS network paths and does not guarantee PrivateLink usage the way sourceVpce does.

NEW QUESTION # 127
A security engineer is implementing a logging solution for a company's AWS environment. The security engineer has configured an AWS CloudTrail trail in the company's AWS account. The logs are stored in an Amazon S3 bucket for a third-party service provider to monitor. The service provider has a designated IAM role to access the S3 bucket.
The company requires all logs to be encrypted at rest with a customer managed key. The security engineer uses AWS Key Management Service (AWS KMS) to create the customer managed key and key policy. The security engineer also configures CloudTrail to use the key to encrypt the trail.
When the security engineer implements this configuration, the service provider no longer can read the logs.
What should the security engineer do to allow the service provider to read the logs?

A. Add the AWSKeyManagementServicePowerUser AWS managed policy to the service provider's role.
B. Migrate the key to AWS Certificate Manager (ACM) to create a shared endpoint for access to the key.
C. Add a statement to the key policy to allow the service provider's role the kms:Decrypt action for the key.
D. Ensure that the S3 bucket policy allows access to the service provider's role to decrypt objects.

Answer: C

Explanation:
When using a customer-managed AWS KMS key to encrypt CloudTrail logs, any role or principal that needs to read (decrypt) the logs must have permission to use the kms:Decrypt action on the key. By adding a statement to the key policy that grants kms:Decrypt access to the service provider's IAM role, the security engineer can ensure that the service provider has the necessary permissions to decrypt and read the encrypted logs in the S3 bucket.

NEW QUESTION # 128
A company stores sensitive data in an Amazon S3 bucket. The company encrypts the data at rest by using server-side encryption with Amazon S3 managed keys (SSE-S3). A security engineer must prevent any modifications to the data in the S3 bucket. Which solution will meet this requirement?

A. Configure S3 Object Lock in compliance mode with S3 bucket versioning enabled.
B. Configure the S3 bucket with multi-factor authentication (MFA) delete protection.
C. Change the encryption on the S3 bucket to use AWS Key Management Service (AWS KMS) customer managed keys.
D. Configure S3 bucket policies to deny DELETE and PUT object permissions.

Answer: A

Explanation:
Amazon S3 Object Lock in compliance mode provides write-once-read-many (WORM) protection, which prevents objects from being modified or deleted for a specified retention period. According to the AWS Certified Security - Specialty Study Guide, compliance mode enforces immutability even for the root user and cannot be overridden.
Enabling S3 Object Lock requires S3 bucket versioning and ensures that once an object is written, it cannot be changed or removed until the retention period expires. This is the strongest protection against data modification and is commonly used for regulatory and legal retention requirements.
Option A can be bypassed by administrators. Option D only protects against deletions, not overwrites. Option C changes encryption but does not prevent modification.
AWS documentation explicitly identifies S3 Object Lock in compliance mode as the correct solution for immutable data storage.

NEW QUESTION # 129
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