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Amazon SCS-C02 Exam Syllabus Topics:
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Amazon AWS Certified Security - Specialty Sample Questions (Q140-Q145):
NEW QUESTION # 140
A company wants to configure DNS Security Extensions (DNSSEC) for the company's primary domain. The company registers the domain with Amazon Route 53. The company hosts the domain on Amazon EC2 instances by using BIND.
What is the MOST operationally efficient solution that meets this requirement?
- A. Migrate the zone to Route 53 with DNSSEC signing enabled. Create a key-signing key (KSK) that is based on an AWS Key Management Service (AWS KMS) customer managed key. Add a delegation signer (DS) record to the parent zone.
- B. Migrate the zone to Route 53 with DNSSEC signing enabled. Create a zone-signing key (ZSK) and a key-signing key (KSK) that are based on an AWS. Key Management Service (AWS KMS) customer managed key.
- C. Set the dnssec-enable option to yes in the BIND configuration. Create a zone-signing key (ZSK) and a key-signing key (KSK) Restart the BIND service.
- D. Set the dnssec-enable option to yes in the BIND configuration. Create a zone-signing key (ZSK) and a key-signing key (KSK). Run the dnssec-signzone command to generate a delegation signer (DS) record Use AWS. Key Management Service (AWS KMS) to secure the keys.
Answer: A
Explanation:
Explanation
To configure DNSSEC for a domain registered with Route 53, the most operationally efficient solution is to migrate the zone to Route 53 with DNSSEC signing enabled, create a key-signing key (KSK) that is based on an AWS Key Management Service (AWS KMS) customer managed key, and add a delegation signer (DS) record to the parent zone. This way, Route 53 handles the zone-signing key (ZSK) and the signing of the records in the hosted zone, and the customer only needs to manage the KSK in AWS KMS and provide the DS record to the domain registrar. Option A is incorrect because it does not involve migrating the zone to Route
53, which would simplify the DNSSEC configuration. Option B is incorrect because it creates both a ZSK and a KSK based on AWS KMS customer managed keys, which is unnecessary and less efficient than letting Route 53 manage the ZSK. Option C is incorrect because it does not involve migrating the zone to Route 53, and it requires running the dnssec-signzone command manually, which is less efficient than letting Route 53 sign the zone automatically. Verified References:
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-configure-dnssec.html
https://aws.amazon.com/about-aws/whats-new/2020/12/announcing-amazon-route-53-support-dnssec/
NEW QUESTION # 141
While securing the connection between a company's VPC and its on-premises data center, a security engineer sent a ping command from an on-premises host (IP address 203.0.113.12) to an Amazon EC2 instance (IP address 172.31.16.139). The ping command did not return a response. The flow log in the VPC showed the following:
What action should be performed to allow the ping to work?
- A. In the security group of the EC2 instance, allow outbound ICMP traffic.
- B. In the VPC's NACL, allow inbound ICMP traffic.
- C. In the security group of the EC2 instance, allow inbound ICMP traffic.
- D. In the VPC's NACL, allow outbound ICMP traffic.
Answer: D
Explanation:
NACLs are stateless and do not track the state of a connection, while Security Groups are stateful and allow traffic based on the response to previous traffic.
Default rule: NACLs have a default rule that denies all traffic, while Security Groups have a default rule that allows all traffic.
NEW QUESTION # 142
A company hosts business-critical applications on Amazon EC2 instances in a VPC. The VPC uses default DHCP options sets. A security engineer needs to log all DNS queries that internal resources make in the VPC.
The security engineer also must create a list of the most common DNS queries over time.
Which solution will meet these requirements?
- A. Install a BIND DNS server in the VPC. Create a bash script to list the DNS request number of common DNS queries from the BIND logs.
- B. Configure Amazon Route 53 Resolver query logging. Add an Amazon CloudWatch Logs log group as the destination. Use Amazon CloudWatch Contributor Insights to analyze the data and create time series that display the most common DNS queries.
- C. Create VPC flow logs for all subnets in the VPC. Stream the flow logs to an Amazon CloudWatch Logs log group. Use CloudWatch Logs Insights to list the most common DNS queries for the log group in a custom dashboard.
- D. Install the Amazon CloudWatch agent on each EC2 instance in the VPC. Use the CloudWatch agent to stream the DNS query logs to an Amazon CloudWatch Logs log group. Use CloudWatch metric filters to automatically generate metrics that list the most common ONS queries.
Answer: B
Explanation:
https://aws.amazon.com/blogs/aws/log-your-vpc-dns-queries-with-route-53-resolver-query-logs/
NEW QUESTION # 143
A company uses SAML federation to grant users access to AWS accounts. A company workload that is in an isolated AWS account runs on immutable infrastructure with no human access to Amazon EC2. The company requires a specialized user known as a break glass user to have access to the workload AWS account and instances in the case of SAML errors. A recent audit discovered that the company did not create the break glass user for the AWS account that contains the workload.
The company must create the break glass user. The company must log any activities of the break glass user and send the logs to a security team.
Which combination of solutions will meet these requirements? (Choose two.)
- A. Configure AWS Systems Manager Session Manager for Amazon EC2. Configure an AWS CloudTrail filter based on Session Manager. Send the results to an Amazon Simple Notification Service (Amazon SNS) topic.
- B. Create a local individual break glass IAM user on the operating system level of each workload instance. Configure unrestricted security groups on the instances to grant access to the break glass IAM users.
- C. Create a local individual break glass IAM user for the security team. Create a trail in AWS CloudTrail that has Amazon CloudWatch Logs turned on. Use Amazon EventBridge to monitor local user activities.
- D. Create a break glass EC2 key pair for the AWS account. Provide the key pair to the security team. Use AWS CloudTrail to monitor key pair activity. Send notifications to the security team by using Amazon Simple Notification Service (Amazon SNS).
- E. Create a break glass IAM role for the account. Allow security team members to perform the AssumeRoleWithSAML operation. Create an AWS CloudTrail trail that has Amazon CloudWatch Logs turned on. Use Amazon EventBridge to monitor security team activities.
Answer: A,E
Explanation:
https://docs.aws.amazon.com/whitepapers/latest/organizing-your-aws-environment/break-glass- access.html
NEW QUESTION # 144
A company is using Amazon Elastic Container Service (Amazon ECS) to run its container-based application on AWS. The company needs to ensure that the container images contain no severe vulnerabilities. The company also must ensure that only specific IAM roles and specific AWS accounts can access the container images.
Which solution will meet these requirements with the LEAST management overhead?
- A. Pull images from the public container registry. Publish the images to Amazon Elastic Container Registry (Amazon ECR) repositories with scan on push configured in a centralized AWS account. Use a CI/CD pipeline to deploy the images to different AWS accounts. Use identity-based policies to restrict access to which IAM principals can access the images.
- B. Pull images from the public container registry. Publish the images to AWS CodeArtifact repositories in a centralized AWS account. Use a CI/CD pipeline to deploy the images to different AWS accounts. Use repository policies and identity-based policies to restrict access to which IAM principals and accounts can access the images.
- C. Pull images from the public container registry. Publish the images to a private container registry that is hosted on Amazon EC2 instances in a centralized AWS account. Deploy host-based container scanning tools to EC2 instances that run Amazon ECS. Restrict access to the container images by using basic authentication over HTTPS.
- D. Pull images from the public container registry. Publish the images to Amazon Elastic Container Registry (Amazon ECR) repositories with scan on push configured in a centralized AWS account. Use a CI/CD pipeline to deploy the images to different AWS accounts. Use repository policies and identity-based policies to restrict access to which IAM principals and accounts can access the images.
Answer: D
Explanation:
The correct answer is C. Pull images from the public container registry. Publish the images to Amazon Elastic Container Registry (Amazon ECR) repositories with scan on push configured in a centralized AWS account. Use a CI/CD pipeline to deploy the images to different AWS accounts. Use repository policies and identity-based policies to restrict access to which IAM principals and accounts can access the images.
This solution meets the requirements because:
Amazon ECR is a fully managed container registry service that supports Docker and OCI images and artifacts1. It integrates with Amazon ECS and other AWS services to simplify the development and deployment of container-based applications.
Amazon ECR provides image scanning on push, which uses the Common Vulnerabilities and Exposures (CVEs) database from the open-source Clair project to detect software vulnerabilities in container images2. The scan results are available in the AWS Management Console, AWS CLI, or AWS SDKs2.
Amazon ECR supports cross-account access to repositories, which allows sharing images across multiple AWS accounts3. This can be achieved by using repository policies, which are resource-based policies that specify which IAM principals and accounts can access the repositories and what actions they can perform4. Additionally, identity-based policies can be used to control which IAM roles in each account can access the repositories5.
The other options are incorrect because:
A) This option does not use repository policies to restrict cross-account access to the images, which is a requirement. Identity-based policies alone are not sufficient to control access to Amazon ECR repositories5.
B) This option does not use Amazon ECR, which is a fully managed service that provides image scanning and cross-account access features. Hosting a private container registry on EC2 instances would require more management overhead and additional security measures.
D) This option uses AWS CodeArtifact, which is a fully managed artifact repository service that supports Maven, npm, NuGet, PyPI, and generic package formats6. However, AWS CodeArtifact does not support Docker or OCI container images, which are required for Amazon ECS applications.
NEW QUESTION # 145
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