Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company stores sensitive financial data in an Amazon S3 bucket. The security policy requires that all data must be encrypted in transit. The security administrator discovers that some automated scripts are using HTTP instead of HTTPS to upload files. The administrator must enforce that any request that does not use HTTPS is denied by the S3 bucket policy. Which condition key should the administrator include in the bucket policy to enforce this requirement?
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
aws:SourceIp
This condition key is used to restrict access based on the requester's IP address, not the transport protocol. It does not enforce HTTPS.
B
Distractor review
aws:Referer
This condition key allows or denies access based on the HTTP Referer header, often used to prevent hotlinking. It does not enforce HTTPS.
C
Best answer
aws:SecureTransport
This condition key checks if the request was sent over SSL/TLS. When set to 'false', the condition matches HTTP requests, allowing the policy to deny them. This is the correct key to enforce encryption in transit.
D
Distractor review
s3:x-amz-server-side-encryption
This condition key is used to enforce server-side encryption at rest, such as requiring AES256 or aws:kms. It does not control whether the connection uses HTTPS.
Common exam trap
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Technical deep dive
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
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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?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: aws:SecureTransport — The aws:SecureTransport condition key in an S3 bucket policy checks whether the request was sent using SSL/TLS (HTTPS). By setting this condition to 'false' and denying the effect, the policy will reject any HTTP requests. This is a straightforward way to enforce encryption in transit for S3. The other options are incorrect: aws:SourceIp restricts based on IP address, aws:Referer restricts based on the HTTP Referer header, and s3:x-amz-server-side-encryption is used for encryption at rest, not in transit.
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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