- A
AWS Systems Manager Session Manager
Correct. Session Manager offers browser-based shell access to EC2 instances through the AWS Management Console or CLI, using the SSM Agent and without requiring any inbound open ports. It is designed for secure, agent-based instance management.
- B
AWS Certificate Manager
Why wrong: Incorrect. AWS Certificate Manager (ACM) provisions, manages, and deploys public and private SSL/TLS certificates for use with AWS services like ELB, CloudFront, and API Gateway. It does not provide shell access to instances.
- C
AWS CloudHSM
Why wrong: Incorrect. AWS CloudHSM provides dedicated hardware security modules (HSMs) for cryptographic key storage and operations, meeting compliance requirements for key management. It does not provide remote shell access.
- D
Amazon GuardDuty
Why wrong: Incorrect. Amazon GuardDuty is a continuous threat detection service that analyzes AWS CloudTrail logs, VPC Flow Logs, and DNS logs to identify malicious or unauthorized behavior. It does not provide interactive shell sessions.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company's security policy prohibits opening SSH (port 22) or RDP (port 3389) to the internet for any Amazon EC2 instance. The operations team needs a way to establish secure shell sessions to manage instances directly from the AWS Management Console without managing bastion hosts or SSH keys. Which AWS service provides this capability?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Systems Manager Session Manager
AWS Systems Manager Session Manager enables secure shell access to EC2 instances directly from the AWS Management Console without opening inbound ports (22 or 3389) or managing bastion hosts. It uses the SSM Agent and AWS Identity and Access Management (IAM) policies to establish a bidirectional connection over HTTPS (port 443), eliminating the need for SSH keys or public IP addresses. This fully satisfies the security policy requirement while providing the desired management capability.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS Systems Manager Session Manager
Why this is correct
Correct. Session Manager offers browser-based shell access to EC2 instances through the AWS Management Console or CLI, using the SSM Agent and without requiring any inbound open ports. It is designed for secure, agent-based instance management.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Certificate Manager
Why it's wrong here
Incorrect. AWS Certificate Manager (ACM) provisions, manages, and deploys public and private SSL/TLS certificates for use with AWS services like ELB, CloudFront, and API Gateway. It does not provide shell access to instances.
When this WOULD be correct
A question asking for a service to provision, manage, and deploy public and private SSL/TLS certificates for use with AWS services or internal resources, without needing to handle certificate renewals manually.
- ✗
AWS CloudHSM
Why it's wrong here
Incorrect. AWS CloudHSM provides dedicated hardware security modules (HSMs) for cryptographic key storage and operations, meeting compliance requirements for key management. It does not provide remote shell access.
When this WOULD be correct
A question asking for a service to manage cryptographic keys in a dedicated HSM appliance, especially for compliance with FIPS 140-2 Level 3, where you need to offload key generation and storage from application servers.
- ✗
Amazon GuardDuty
Why it's wrong here
Incorrect. Amazon GuardDuty is a continuous threat detection service that analyzes AWS CloudTrail logs, VPC Flow Logs, and DNS logs to identify malicious or unauthorized behavior. It does not provide interactive shell sessions.
When this WOULD be correct
A question asking: 'Which AWS service continuously monitors for malicious or unauthorized behavior to help protect AWS accounts and workloads?' would make GuardDuty the correct answer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓AWS Systems Manager Session ManagerCorrect answer▾
Why this is correct
Correct. Session Manager offers browser-based shell access to EC2 instances through the AWS Management Console or CLI, using the SSM Agent and without requiring any inbound open ports. It is designed for secure, agent-based instance management.
✗AWS Certificate ManagerWrong answer — click to see why▾
Why this is wrong here
AWS Certificate Manager manages SSL/TLS certificates, not secure shell sessions. It does not provide remote access to EC2 instances.
★ When this WOULD be the correct answer
A question asking for a service to provision, manage, and deploy public and private SSL/TLS certificates for use with AWS services or internal resources, without needing to handle certificate renewals manually.
Why candidates choose this
Candidates may confuse 'secure shell' with 'secure certificates' due to the word 'secure', or think that certificates are required for SSH authentication.
✗AWS CloudHSMWrong answer — click to see why▾
Why this is wrong here
AWS CloudHSM provides hardware security modules for cryptographic key storage, not remote shell access to EC2 instances. It cannot establish SSH or RDP sessions.
★ When this WOULD be the correct answer
A question asking for a service to manage cryptographic keys in a dedicated HSM appliance, especially for compliance with FIPS 140-2 Level 3, where you need to offload key generation and storage from application servers.
Why candidates choose this
Candidates may confuse 'secure shell' with 'security' and think CloudHSM provides secure access, or they may misread the question as needing a secure key management solution for instance authentication.
✗Amazon GuardDutyWrong answer — click to see why▾
Why this is wrong here
Amazon GuardDuty is a threat detection service that monitors for malicious activity, not a tool for establishing secure shell sessions to manage EC2 instances.
★ When this WOULD be the correct answer
A question asking: 'Which AWS service continuously monitors for malicious or unauthorized behavior to help protect AWS accounts and workloads?' would make GuardDuty the correct answer.
Why candidates choose this
Candidates may confuse GuardDuty's security monitoring capabilities with the ability to provide secure access, or they might think it can manage sessions due to its 'security' label.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse AWS Certificate Manager (a certificate provisioning service) or AWS CloudHSM (a hardware security module) with a secure access tool, when the correct answer is a systems management service that operates over HTTPS without opening traditional remote access ports.
Detailed technical explanation
How to think about this question
Session Manager leverages the SSM Agent installed on the EC2 instance to create a secure WebSocket connection through the AWS Systems Manager service, using IAM policies for authentication and authorization. All session data is encrypted in transit using TLS 1.2 and can be optionally logged to Amazon S3 or Amazon CloudWatch Logs for auditing. In a real-world scenario, this allows operations teams to manage instances in private subnets without any public exposure, even if the instance has no Elastic IP or public DNS.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Systems Manager Session Manager — AWS Systems Manager Session Manager enables secure shell access to EC2 instances directly from the AWS Management Console without opening inbound ports (22 or 3389) or managing bastion hosts. It uses the SSM Agent and AWS Identity and Access Management (IAM) policies to establish a bidirectional connection over HTTPS (port 443), eliminating the need for SSH keys or public IP addresses. This fully satisfies the security policy requirement while providing the desired management capability.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.
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