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NEW QUESTION # 16
A company is using Amazon EC2 instances to host an application in a private subnet in a VPC.
The application needs to use AWS KMS.
What is the MOST secure way for a security engineer to meet this requirement?
Answer: D
Explanation:
AWS KMS supports interface VPC endpoints powered by AWS PrivateLink. An interface endpoint gives resources in the VPC private IP connectivity to AWS KMS without requiring public IP addresses, an internet gateway, a NAT gateway, VPN, or Direct Connect. This is the most secure design because the EC2 instances remain in private subnets and KMS API traffic stays on the AWS private network path. A gateway endpoint is not available for AWS KMS; gateway endpoints are used for services such as Amazon S3 and DynamoDB. Moving instances to public subnets or routing through a NAT gateway is less secure because it introduces unnecessary internet egress architecture.
NEW QUESTION # 17
A security engineer needs to prepare a company's Amazon EC2 instances for quarantine during a security incident. The AWS Systems Manager Agent (SSM Agent) has been deployed to all EC2 instances. The security engineer has developed a script to install and update forensics tools on the EC2 instances. Which solution will quarantine EC2 instances during a security incident?
Answer: A
Explanation:
AWS Systems Manager Run Command enables security engineers to remotely and securely execute scripts on EC2 instances without requiring SSH or inbound network access. According to AWS Certified Security - Specialty incident response guidance, Run Command is a foundational tool for instance quarantine and forensic preparation.
By configuring IAM permissions that allow the SSM Agent to execute a predefined Run Command document, the security engineer can rapidly deploy forensic tools, disable services, or modify system configurations across affected EC2 instances during an incident. This approach aligns with AWS best practices for containment and evidence preservation, while maintaining auditability through Systems Manager logs.
NEW QUESTION # 18
A company is using AWS to run a long-running analysis process on data that is stored in Amazon S3 buckets.
The process runs on a fleet of Amazon EC2 instances in an Auto Scaling group. The EC2 instances are deployed in a private subnet that does not have internet access.
The EC2 instances access Amazon S3 through an S3 gateway endpoint that has the default access policy.
Each EC2 instance uses an instance profile role that allows s3:GetObject and s3:PutObject only for required S3 buckets.
The company learns that one or more EC2 instances are compromised and are exfiltrating data to an S3 bucket that isoutside the company's AWS Organization. The processing job must continue to function.
Which solution will meet these requirements?
Answer: B
Explanation:
Amazon S3 gateway endpoints supportendpoint policiesthat can restrict which S3 resources are accessible through the endpoint. According to AWS Certified Security - Specialty documentation, endpoint policies are evaluatedin addition to IAM policiesand are ideal for enforcingdata exfiltration controlswithout breaking legitimate workloads.
By updating the S3 gateway endpoint policy to require both aws:ResourceOrgId and aws:PrincipalOrgId to match the company's AWS Organization, the security engineer ensures that EC2 instances can accessonly S3 buckets that belong to the organization. This immediately blocks exfiltration to external S3 buckets while allowing legitimate internal data access to continue uninterrupted.
Option B is insufficient because IAM policies alone cannot prevent access when the endpoint allows it.
Option C would break all S3 access and stop the processing job. Option D applies too broadly and can impact unrelated services across the account.
AWS documentation highlightsS3 VPC endpoint policies with organization condition keysas a best practice for preventing S3 data exfiltration in private VPC environments.
* AWS Certified Security - Specialty Official Study Guide
* Amazon S3 VPC Endpoint Policy Documentation
* AWS Organizations Condition Keys Documentation
NEW QUESTION # 19
A startup company is using a single AWS account that has resources in a single AWS Region. A security engineer configures an AWS CloudTrail trail in the same Region to deliver log files to an Amazon S3 bucket by using the AWS CLI. Because of expansion, the company adds resources in multiple Regions. The security engineer notices that the logs from the new Regions are not reaching the S3 bucket.
What should the security engineer do to fix this issue with the LEAST amount of operational overhead?
Answer: C
Explanation:
CloudTrail trails can be configured as eithersingle-Regionormulti-Region. A single-Region trail delivers events only for the Region in which it is created; when the company begins using additional Regions, those events will not be logged to the existing S3 destination unless the trail is updated. The least operational overhead is tomodify the existing trailand enablemulti-Regionlogging (that is, configure the trail to "apply to all Regions"). This preserves the current S3 bucket destination, encryption settings, log file validation configuration, IAM roles, and any integrations that already depend on the existing trail name and S3 prefix structure.
Creating a new trail (Options A or C) increases overhead because the engineer would need to manage multiple trails or migrate downstream processes (alerting, Athena tables, SIEM ingestion, retention policies, and lifecycle rules). Option B is not how CloudTrail works-S3 notifications do not cause CloudTrail to collect events from other Regions; CloudTrail must be configured to generate and deliver those logs.
Therefore, updating the existing trail to be multi-Region is the simplest and most maintainable fix.
NEW QUESTION # 20
A security engineer wants to forward custom application-security logs from an Amazon EC2 instance to Amazon CloudWatch. The security engineer installs the CloudWatch agent on the EC2 instance and adds the path of the logs to the CloudWatch configuration file.
However, CloudWatch does not receive the logs. The security engineer verifies that the awslogs service is running on the EC2 instance.
What should the security engineer do next to resolve the issue?
Answer: B
Explanation:
The Amazon CloudWatch agent requires explicit IAM permissions to create log groups, create log streams, and put log events into Amazon CloudWatch Logs. According to the AWS Certified Security - Specialty Study Guide, the most common cause of CloudWatch agent log delivery failures is missing or insufficient IAM permissions on the EC2 instance role.
The CloudWatchAgentServerPolicy AWS managed policy provides the required permissions, including logs:CreateLogGroup, logs:CreateLogStream, and logs:PutLogEvents. Attaching this policy to the EC2 instance role enables the CloudWatch agent to successfully deliver custom application logs without requiring changes to the application or logging configuration.
Options A, B, and C are incorrect because CloudTrail, Amazon S3, and Amazon Inspector are not designed to ingest custom application logs from EC2 instances in this manner. AWS documentation clearly states that IAM permissions must be granted to the EC2 role for CloudWatch Logs ingestion.
This approach aligns with AWS best practices for least privilege while ensuring reliable detection and monitoring capabilities.
NEW QUESTION # 21
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