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NEW QUESTION # 38
A company runs an application on an Amazon EC2 instance. The application generates invoices and stores them in an Amazon S3 bucket. The instance profile that is attached to the instance has appropriate access to the S3 bucket. The company needs to share each invoice with multiple clients that do not have AWS credentials. Each client must be able to download only the client's own invoices. Clients must download their invoices within 1 hour of invoice creation. Clients must use only temporary credentials to access the company's AWS resources.
Which additional step will meet these requirements?
Answer: B
Explanation:
Amazon S3 pre-signed URLs grant temporary access based on the permissions of the principal that generates them. AWS Certified Security - Specialty documentation explains that fine-grained authorization can be enforced by combining pre-signed URLs with IAM policy conditions.
By tagging each invoice object with a client identifier and adding a condition to the EC2 instance role policy using s3:ResourceTag/ClientId, the role can generate pre-signed URLs only for objects associated with a specific client. This ensures that each client can access only their own invoices, even though the URLs are temporary and unauthenticated.
Option A over-permissions clients. Option C is unnecessary because instance profiles already use temporary credentials. Option D violates AWS best practices by using long-term credentials.
AWS recommends resource tagging with IAM policy conditions for scalable, secure access control.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
Amazon S3 Pre-Signed URLs
IAM Policy Conditions and Resource Tags
NEW QUESTION # 39
A company has security requirements for Amazon Aurora MySQL databases regarding encryption, deletion protection, public access, and audit logging. The company needs continuous monitoring and real-time visibility into compliance status. Which solution will meet these requirements?
Answer: A
Explanation:
AWS Config is the AWS service designed to continuously evaluate resource configurations against defined rules. According to the AWS Certified Security - Specialty Study Guide, AWS Config managed rules exist specifically to check database encryption, public accessibility, deletion protection, and log exports for Amazon RDS and Aurora.
AWS Config provides a real-time compliance timeline and displays the compliance state of each resource against each rule at any point in time. This granular visibility is required to assess ongoing compliance with security policies.
Audit Manager generates reports but does not provide continuous compliance monitoring.
Security Hub aggregates findings but does not track configuration drift. EventBridge and Lambda introduce unnecessary complexity.
NEW QUESTION # 40
A company needs to implement DNS Security Extensions (DNSSEC) for a specific subdomain. The subdomain is already registered with Amazon Route 53. A security engineer has enabled DNSSEC signing and has created a key-signing key (KSK). When the security engineer tries to test the configuration, the security engineer receives an error for a broken trust chain.
What should the security engineer do to resolve this error?
Answer: B
Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
DNSSEC validation depends on a chain of trust from the parent zone to the signed child zone. After enabling DNSSEC signing and creating a KSK for the subdomain, the parent zone must contain a Delegation Signer (DS) record that points to the child zone's DNSSEC key material. Without the DS record in the parent, validating resolvers cannot establish the trust chain, so the configuration appears broken. The DS record does not belong in the subdomain zone itself for this trust-linking purpose. Replacing the KSK with a ZSK is conceptually wrong because the KSK is the key associated with the DS record chain. Reactivating the KSK does not fix a missing parent-zone delegation signer record.
NEW QUESTION # 41
A security engineer needs to configure DDoS protection for a Network Load Balancer (NLB) with an Elastic IP address. The security engineer wants to set up an AWS WAF web ACL with a rate-based rule statement to protect the NLB.
The security engineer needs to determine a rate limit that will not block legitimate traffic. The security engineer has configured the rule statement to aggregate based on the source IP address.
How should the security engineer configure the rule to protect the NLB?
Answer: B
Explanation:
AWS WAF rate-based rules are designed to help protect applications and resources fromtraffic floods and application-layer DDoS attacksby tracking the number of requests from individual source IP addresses over a rolling time window. According to the AWS Certified Security - Specialty Official Study Guide and AWS WAF documentation, rate-based rules can be configured with different actions, includingCount,Block, and Allow.
When a security engineer is determining an appropriate rate limit that will not block legitimate traffic, AWS best practices recommend initially configuring the rate-based rule with theCountaction. The Count action allows AWS WAF tomonitor and log requests that exceed the specified rate threshold without actively blocking them. This provides visibility into traffic patterns and enables the security engineer to analyze how the rule would behave in production.
By using the Count action, the security engineer can safely evaluate whether legitimate users would be affected by the chosen rate limit. Once the engineer is confident that the threshold accurately distinguishes between normal traffic and malicious behavior, the action can later be changed to Block.
Option B is incorrect because immediately blocking traffic without validation risks denying service to legitimate users. Option C is invalid because AWS WAF does not have a Monitor action. Option D is incorrect because the Allow action does not enforce rate limiting.
AWS documentation explicitly recommendsstarting rate-based rules in Count modeto fine-tune thresholds before enforcing blocks, especially for DDoS protection scenarios.
* AWS Certified Security - Specialty Official Study Guide
* AWS WAF Developer Guide - Rate-Based Rules
* AWS DDoS Resiliency Best Practices
NEW QUESTION # 42
A security engineer discovers that a company's user passwords have no required minimum length. The company uses the following identity providers (IdPs):
* AWS Identity and Access Management (IAM) federated with on-premises Active Directory
* Amazon Cognito user pools that contain the user database for an AWS Cloud application Which combination of actions should the security engineer take to implement a required minimum password length? (Select TWO.)
Answer: D,E
Explanation:
Password policies are enforced at the identity provider where authentication occurs. According to the AWS Certified Security - Specialty Study Guide, when IAM is federated with an external identity provider such as on-premises Active Directory, IAM does not manage or enforce password policies. Instead, password requirements such as minimum length must be enforced directly in Active Directory Group Policy Objects.
Amazon Cognito user pools maintain their own user directory and authentication logic. Cognito provides configurable password policies, including minimum length, complexity, and expiration. To enforce a minimum password length for application users, the Cognito user pool password policy must be updated.
IAM password policies apply only to IAM users that authenticate directly with IAM and do not affect federated users or Cognito users. SCPs and IAM policies cannot enforce password length requirements.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS IAM Federation and Password Policies
Amazon Cognito User Pool Security Settings
NEW QUESTION # 43
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