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| Certification Vendor: | Amazon Web Services (AWS) |
|---|---|
| Exam Name: | AWS Certified Security - Specialty (SCS-C03) |
| Exam Number: | SCS-C03 |
| Certificate Validity Period: | 3 years |
| Available Languages: | Korean, Simplified Chinese, English, Japanese |
| Exam Format: | Multiple response, Multiple choice |
| Real Exam Qty: | 65 (multiple choice and multiple response) |
| Related Certifications: | AWS Certified Solutions Architect - Associate AWS Certified Solutions Architect - Professional AWS Certified DevOps Engineer - Professional AWS Certified Advanced Networking - Specialty AWS Certified SysOps Administrator - Associate |
| Passing Score: | 750 (scaled score out of 1000) |
| Exam Duration: | 170 minutes |
| Exam Price: | $300 USD |
| Recommended Training: | AWS Skill Builder - Security Learning Path AWS Certified Security - Specialty Exam Prep |
| Exam Registration: | AWS Certification Portal AWS Certification Official Registration |
| Sample Questions: | Amazon SCS-C03 Sample Questions |
| Exam Way: | Online proctored or testing center (onsite) |
| Pre Condition: | No mandatory prerequisite, but recommended experience: 5+ years in IT security and 2+ years securing AWS workloads |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-security-specialty/ |
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質問 # 245
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.
A security engineer creates a script that runs on the EC2 instance. The script uses the instance profile to generate an S3 presigned URL for the clients. Each presigned URL expires after 1 hour.
Which additional step will meet these requirements?
正解：B
解説：
Using AWS Security Token Service to assume a role and generate temporary credentials ensures that access is based on short-lived, ephemeral security credentials rather than long-term credentials. These temporary credentials are then used to create presigned URLs that expire after 1 hour, satisfying both the requirement for time-limited access and the mandate that clients interact only through temporary credentials when accessing the company's AWS resources.
質問 # 246
A company's web application runs on Amazon EC2 instances behind an Application Load Balancer (ALB) in an Auto Scaling group. An AWS WAF web ACL is associated with the ALB. Instance logs are lost after reboots. The operations team suspects malicious activity targeting a specific PHP file.
Which set of actions will identify the suspect attacker's IP address for future occurrences?
正解：A
解説：
AWS WAF logs contain detailed request-level information, including source IP addresses, requested URIs, and rule matches. According to AWS Certified Security - Specialty guidance, enabling AWS WAF logging provides the most reliable and tamper-resistant method to investigate web-based attacks, especially when instance-level logs are unavailable.
By streaming WAF logs through Amazon Kinesis Data Firehose to Amazon S3, the company ensures durable, centralized log storage that is independent of EC2 lifecycle events. Amazon Athena can then query the logs efficiently to identify repeated requests to the new-user-creation.php endpoint and extract attacker IP addresses.
VPC Flow Logs do not capture HTTP-level details. ALB access logs alone may not capture blocked requests.
WAF logs provide the best forensic visibility for future detection.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS WAF Logging and Monitoring
Amazon Athena Log Analysis
質問 # 247
A company's platform has grown rapidly over the past 6 months. The company's platform architecture evolved quickly to accommodate the growth. The company's development team has been deploying features quickly by using different AWS services. The development team has not performed formal architecture reviews.
The company needs to evaluate its security posture against AWS security best practices.
Which solution will meet these requirements?
正解：C
解説：
The AWS Well-Architected Tool is designed to evaluate workloads against AWS best practices, including the Security Pillar. Creating a workload and answering the security questions based on the current architecture gives the company a structured review of identity, detection, infrastructure protection, data protection, and incident response practices. Milestones record the state of the workload at a point in time and help track improvement as high-risk issues are remediated. Cost Explorer is for cost analysis, not security posture review. Security Hub CSPM provides control findings but does not replace a full Well- Architected workload review. Amazon Detective supports investigation of security findings, not architecture best-practice assessment.
質問 # 248
A company's security engineer receives an alert that indicates that an unexpected principal is accessing a company-owned Amazon Simple Queue Service (Amazon SQS) queue. All the company's accounts are within an organization in AWS Organizations. The security engineer must implement a mitigation solution that minimizes compliance violations and investment in tools outside of AWS. What should the security engineer do to meet these requirements?
正解：A
解説：
Amazon SQS is a regional service that supports AWS PrivateLink through interface VPC endpoints. According to AWS Certified Security - Specialty documentation, the most secure and compliant way to restrict access to AWS services is by using VPC endpoints combined with resource-based policies.
By creating interface VPC endpoints for Amazon SQS in all VPCs, traffic to SQS remains on the AWS network and does not traverse the public internet. Using the aws:SourceVpce condition in the SQS queue policy ensures that only requests originating from approved VPC endpoints can access the queue. Adding the aws:PrincipalOrgId condition further restricts access to principals that belong to the same AWS Organization.
Security groups and network ACLs do not apply to SQS because SQS is not deployed inside a VPC. Third-party CASB tools add cost and operational overhead.
質問 # 249
A company wants to deploy an application in a private VPC that will not be connected to the internet. The company's security team will not allow bastion hosts or methods using SSH to log in to Amazon EC2 instances. The application team plans to use AWS Systems Manager Session Manager to connect to and manage the EC2 instances.
Which combination of steps should the security team take? (Choose Three.)
正解：A、D、F
解説：
Session Manager requires the target EC2 instance to be a managed node, which means Systems Manager Agent must be installed and running, and the instance profile must grant permissions for Systems Manager communication. In a private VPC with no internet connectivity, the instances need private connectivity to Systems Manager service endpoints through VPC interface endpoints. Depending on configuration, endpoints commonly include Systems Manager, EC2 messages, and Systems Manager messages; EC2 endpoint access can also be needed for related management operations. A NAT gateway would create internet- bound egress and conflicts with the private VPC requirement. A transit gateway does not provide AWS Systems Manager service connectivity by itself. Preventing SSH key pair creation is not required for Session Manager operation.
質問 # 250
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