ANS-C01 Network Design Practice Question
Exhibit
Refer to the exhibit.
```
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"ec2:DescribeVpcs",
"ec2:DescribeSubnets",
"ec2:CreateNetworkInterface",
"ec2:DescribeNetworkInterfaces",
"ec2:AttachNetworkInterface"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"ec2:CreateVpcEndpoint",
"ec2:DescribeVpcEndpoints",
"ec2:ModifyVpcEndpoint"
],
"Resource": "*"
}
]
}
```An administrator needs to create an interface VPC endpoint for Amazon S3 in a VPC and attach an elastic network interface (ENI) to an EC2 instance. The administrator applies the IAM policy shown in the exhibit. Which action will be DENIED by this policy?
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
✓
Create the VPC endpoint
The IAM policy allows ec2:CreateVpcEndpoint, but the Resource is set to "*" which does not satisfy the resource requirement for this action. The ec2:CreateVpcEndpoint action requires the resource to be the VPC endpoint service (e.g., arn:aws:ec2:region:account-id:vpc-endpoint-service/*). Without a specific resource ARN, the policy does not grant permission to create the endpoint, so the action will be denied. In contrast, ec2:AttachNetworkInterface, ec2:DescribeVpcEndpoints, and ec2:ModifyVpcEndpoint are allowed by the policy with the wildcard resource.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Attach the ENI to the EC2 instance
Why it's wrong here
The policy allows ec2:AttachNetworkInterface with Resource "*", so this action is permitted.
- ✓
Create the VPC endpoint
Why this is correct
The policy allows ec2:CreateVpcEndpoint, but the Resource "*" is not sufficient; the action requires the resource to specify the VPC endpoint service ARN. Therefore, this action will be denied.
- ✗
Describe VPC endpoints
Why it's wrong here
The policy allows ec2:DescribeVpcEndpoints with Resource "*", so this action is permitted.
- ✗
Modify the VPC endpoint
Why it's wrong here
The policy allows ec2:ModifyVpcEndpoint with Resource "*", so this action is permitted.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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