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NEW QUESTION # 100
A company has an Amazon RDS database. The database contains sensitive data that is shared across teams in the company. The company needs a solution to detect anomalous logins to the database. The solution must notify an existing Amazon SNS topic when anomalous logins occur.
Which solution will meet these requirements?
Answer: B
Explanation:
GuardDuty RDS Protection is the AWS threat-detection feature designed to detect suspicious and anomalous activity involving supported Amazon RDS databases, including anomalous login behavior. GuardDuty findings are automatically published to EventBridge, and EventBridge rules can route selected finding types or severities to SNS for notification. This directly satisfies both detection and alerting requirements with minimal custom code. Trusted Advisor checks general account and configuration best practices; it does not perform database-login anomaly detection.
AppFabric is for SaaS application security data normalization, not RDS login monitoring. Amazon Inspector is a vulnerability management service and does not detect database login anomalies.
Therefore, GuardDuty RDS Protection plus EventBridge to SNS is the correct security-monitoring pattern.
NEW QUESTION # 101
A company is using Amazon Macie, AWS Firewall Manager, Amazon Inspector, and AWS Shield Advanced in its AWS account. The company wants to receive alerts if a DDoS attack occurs against the account.
Which solution will meet this requirement?
Answer: C
Explanation:
AWS Shield Advanced is the AWS-native managed service specifically designed to provide detection, mitigation, and visibility for Distributed Denial of Service (DDoS) attacks at both the network and application layers. Shield Advanced integrates directly with Amazon CloudWatch by publishing DDoS-related metrics such as DDoSDetected, AttackVolume, and AttackVector, which can be monitored using CloudWatch alarms to trigger alerts in near real time.
NEW QUESTION # 102
A company has a web-based application that runs behind an Application Load Balancer (ALB).
The application is experiencing a credential stuffing attack that is producing many failed login attempts. The attack is coming from many IP addresses. The login attempts are using a user agent string of a known mobile device emulator. A security engineer needs to implement a solution to mitigate the credential stuffing attack. The solution must still allow legitimate logins to the application.
Which solution will meet these requirements?
Answer: A
Explanation:
A credential stuffing attack at the ALB is aLayer 7problem and is best mitigated withAWS WAF.
The attacker is distributed across many IPs, so blocking by IP in a security group (Option B) is ineffective and operationally heavy. A CloudWatch alarm (Option A) only alerts; it does not block or mitigate requests.
Because the malicious traffic uses a distinctive, knownUser-Agentstring associated with a mobile device emulator, AWS WAF can quickly reduce the attack by inspecting the User-Agent header and blocking matching requests. This approach is targeted: it blocks the identified automated attack pattern while allowing legitimate users who do not present that emulator User-Agent to continue logging in. The WAF rule can be deployed immediately on the existing ALB-associated web ACL and can be further refined (for example, applied only to /login paths, combined with rate-based rules, or integrated with Bot Control) to minimize false positives.
NEW QUESTION # 103
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: B
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 # 104
A security engineer for a company is investigating suspicious traffic on a web application in the AWS Cloud. The web application is protected by an Application Load Balancer (ALB) behind an Amazon CloudFront distribution. There is an AWS WAF web ACL associated with the ALB. The company stores AWS WAF logs in an Amazon S3 bucket.
The engineer notices that all incoming requests in the AWS WAF logs originate from a small number of IP addresses that correspond to CloudFront edge locations. The security engineer must identify the source IP addresses of the clients that are initiating the suspicious requests.
Which solution will meet this requirement?
Answer: C
Explanation:
When Amazon CloudFront is used in front of an Application Load Balancer, CloudFront becomes the immediate source of incoming requests to the ALB. As a result, AWS WAF logs record the CloudFront edge location IP addresses as the client IPs, not the original viewer IP addresses.
This behavior is explicitly documented in the AWS Certified Security - Specialty Study Guide and the AWS WAF and CloudFront integration documentation.
To preserve the original client IP address, CloudFront automatically adds the X-Forwarded-For HTTP header, which contains the IP address of the originating client followed by any proxy addresses involved in forwarding the request. AWS WAF logs include this header, making it the authoritative source for identifying true client IP addresses when CloudFront is used.
NEW QUESTION # 105
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