Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company hosts a web application on an Amazon EC2 instance. The company installs its own application software and configures the operating system. The company also uses AWS Key Management Service (AWS KMS) to create a customer-managed key to encrypt data on the Amazon Elastic Block Store (Amazon EBS) volume attached to the instance. According to the AWS shared responsibility model, which of the following is the responsibility of AWS?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Encrypting the data on the Amazon EBS volume using the customer-managed key.
This is a customer responsibility. The customer creates and manages the KMS key and must configure the EBS volume to use that key for encryption. AWS provides the infrastructure for encryption, but the customer controls the key and the encryption settings.
B
Distractor review
Patching the operating system of the Amazon EC2 instance.
This is a customer responsibility. The customer manages the guest operating system, including applying patches and updates. AWS is responsible only for the hypervisor layer and underlying hardware.
C
Best answer
Ensuring the physical security of the data center where the Amazon EC2 instance runs.
This is an AWS responsibility. AWS operates and controls the physical security of its data centers, including access controls, surveillance, and environmental systems. This falls under 'security of the cloud.'
D
Distractor review
Configuring the security group rules to restrict traffic to the Amazon EC2 instance.
This is a customer responsibility. Security groups act as virtual firewalls, and the customer must define the ingress and egress rules. AWS provides the mechanism, but the configuration is the customer's task.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Ensuring the physical security of the data center where the Amazon EC2 instance runs. — The AWS shared responsibility model divides security and compliance obligations between AWS and the customer. AWS is responsible for the security of the cloud, which includes the physical infrastructure (data centers, hardware, networking, and hypervisor) that runs all AWS services. The customer is responsible for security in the cloud, which includes guest operating system updates, application security, network security group configuration, and client-side or server-side encryption using customer-managed keys. In this scenario, encrypting the EBS volume with a customer-managed key, patching the guest OS, and configuring security groups are all customer responsibilities. AWS's responsibility includes the physical security and hardware management of the data center where the EC2 instance runs.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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