試験の準備方法-検証するSCS-C03受験対策解説集試験-高品質なSCS-C03試験対応

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Amazon SCS-C03 認定試験の出題範囲：

トピック出題範囲
トピック 1
  • インフラストラクチャセキュリティ：このドメインは、セキュアなアーキテクチャ、保護メカニズム、および強化された構成を通じて、ネットワーク、コンピューティングリソース、エッジサービスを含むAWSインフラストラクチャのセキュリティ確保に重点を置いています。
トピック 2
  • セキュリティの基盤とガバナンス：このドメインでは、AWS環境におけるポリシー、コンプライアンスフレームワーク、リスク管理、セキュリティ自動化、監査手順など、セキュリティの基盤となる実践方法を取り上げます。
トピック 3
  • IDおよびアクセス管理：この領域は、ユーザーID管理、ロールベースアクセス、フェデレーション、最小権限の原則の実装を通じて、認証と認可を制御することを扱います。
トピック 4
  • インシデント対応：この領域では、自動化および手動による戦略、封じ込め、フォレンジック分析、復旧手順を通じてセキュリティインシデントに対応し、影響を最小限に抑え、業務を復旧させることを扱います。
トピック 5
  • 検出：このドメインは、ログ記録、監視、アラートメカニズムを通じて、AWSにおけるセキュリティイベント、脅威、脆弱性を特定および監視し、異常や不正アクセスを検出することを目的としています。

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Amazon AWS Certified Security - Specialty 認定 SCS-C03 試験問題 (Q105-Q110):

質問 # 105
A company's developers are using AWS Lambda function URLs to invoke functions directly. The company must ensure that developers cannot configure or deploy unauthenticated functions inproduction accounts. The company wants to meet this requirement by using AWS Organizations. The solution must not require additional work for the developers.
Which solution will meet these requirements?

正解：D

解説：
AWS Organizations service control policies (SCPs) are designed to enforce preventive guardrails across accounts without requiring application-level changes. According to the AWS Certified Security - Specialty documentation, SCPs can restrict specific API actions or require certain condition keys to enforce security standards centrally. AWS Lambda function URLs support two authentication modes: AWS_IAM and NONE.
When the authentication type is set to NONE, the function URL becomes publicly accessible, which introduces a significant security risk in production environments.
By using an SCP that explicitly denies the lambda:CreateFunctionUrlConfig and lambda:
UpdateFunctionUrlConfig actions when the lambda:FunctionUrlAuthType condition key equals NONE, the organization ensures that unauthenticated function URLs cannot be created or modified in production accounts. This enforcement occurs at the AWS Organizations level and applies automatically to all accounts within the specified organizational units (OUs). Developers are not required to change their workflows or add additional controls, satisfying the requirement of no additional developer effort.
Option A relates to browser-based access controls and does not provide authentication or authorization enforcement. Option B is not valid because AWS WAF cannot be attached directly to AWS Lambda function URLs. Option C is incorrect because SCPs do not grant permissions; they only limit permissions. AWS documentation clearly states that SCPs define maximum available permissions and are evaluated before IAM policies.
This approach aligns with AWS best practices for centralized governance, least privilege, and preventive security controls.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS Organizations Service Control Policies Documentation
AWS Lambda Security and Function URL Authentication Overview


質問 # 106
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?

正解：C

解説：
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.


質問 # 107
A company allows users to download its mobile app onto their phones. The app is MQTT based and connects to AWS IoT Core to subscribe to specific client-related topics. Recently, the company discovered that some malicious attackers have been trying to get a Trojan horse onto legitimate mobile phones. The Trojan horse poses as the authentic application and uses a client ID with injected special characters to gain access to topics outside the client's privilege scope.
Which combination of actions should the company take to prevent this threat? (Choose two.)

正解：B、C

解説：
The threat is client ID manipulation to break authorization boundaries. The strongest control is tobind the MQTT client identity to the authenticated device identity(the Thing) rather than trusting arbitrary client IDs provided by the client. Using theThing name as the client ID(Option A) removes ambiguity and makes the identifier predictable and tied to a registered identity.
On the authorization side, AWS IoT Core policies can use policy variables. Allowing iot:Connect only when the resource matches client/${iot:Connection.Thing.ThingName} (Option E) ensures the connection is permittedonlyif the client ID exactly equals the authenticated Thing name from the TLS certificate/Thing principal context. This prevents attackers from injecting special characters or choosing a different client ID to escalate access, because the policy evaluation ties the allowed client resource to the Thing identity, not the attacker-controlled string.


質問 # 108
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?

正解：A

解説：
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.


質問 # 109
A company's security team wants to receive near-real-time email notifications about AWS abuse reports related to DoS attacks. An Amazon SNS topic already exists and is subscribed to by the security team. What should the security engineer do next?

正解：C

解説：
AWS abuse notifications are delivered as AWS Health events. According to the AWS Certified Security - Specialty Study Guide, Amazon EventBridge integrates natively with AWS Health and can be used to detect specific event types such as AWS_ABUSE_DOS_REPORT in near real time.
By creating an EventBridge rule that filters for the abuse report event type and publishes directly to Amazon SNS, the solution remains fully managed, low latency, and cost effective.
Polling APIs introduces delay and complexity. CloudTrail does not log abuse notifications.
EventBridge with AWS Health is the recommended mechanism for reacting to AWS service events.


質問 # 110
......

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