- A
Use 'PropagateTags' property in the VPC.
Why wrong: 'PropagateTags' is not a CloudFormation resource property; it is an AWS Organizations feature for propagating tags from the root account. Incorrect.
- B
Use a separate AWS::ResourceGroups::Tagging resource.
Why wrong: While AWS::ResourceGroups::Tagging can tag existing resources, it is not the intended method for tagging during CloudFormation stack creation. The correct approach is to use the resource's own 'Tags' property.
- C
Use the 'Tags' property of the AWS::EC2::Subnet resource.
Correct. The 'Tags' property of 'AWS::EC2::Subnet' allows you to assign tags directly when creating the subnet in a CloudFormation template.
- D
Use the 'TagSpecifications' property of the AWS::EC2::Subnet resource.
Why wrong: 'TagSpecifications' is used for EC2 instances and some other EC2 resources, but for 'AWS::EC2::Subnet', the correct property is 'Tags'. This is a common point of confusion.
ANS-C01 AWS::EC2::Subnet Tags property Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. 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. A key principle to apply: aWS::EC2::Subnet Tags property. 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 is using AWS CloudFormation to deploy network infrastructure. The network team wants to ensure that all subnets created in the VPC have a tag 'Environment' with the value 'Production'. Which CloudFormation resource property should they use?
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
Use the 'Tags' property of the AWS::EC2::Subnet resource.
In AWS CloudFormation, the 'AWS::EC2::Subnet' resource supports the 'Tags' property directly, which is a list of tags to associate with the subnet. This property is available for many resources, including subnets. 'TagSpecifications' is used for EC2 instances and some other resources, but for subnets, 'Tags' is the correct and standard property.
Key principle: AWS::EC2::Subnet Tags property
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use 'PropagateTags' property in the VPC.
Why it's wrong here
'PropagateTags' is not a CloudFormation resource property; it is an AWS Organizations feature for propagating tags from the root account. Incorrect.
- ✗
Use a separate AWS::ResourceGroups::Tagging resource.
Why it's wrong here
While AWS::ResourceGroups::Tagging can tag existing resources, it is not the intended method for tagging during CloudFormation stack creation. The correct approach is to use the resource's own 'Tags' property.
- ✓
Use the 'Tags' property of the AWS::EC2::Subnet resource.
Why this is correct
Correct. The 'Tags' property of 'AWS::EC2::Subnet' allows you to assign tags directly when creating the subnet in a CloudFormation template.
Related concept
AWS::EC2::Subnet Tags property
- ✗
Use the 'TagSpecifications' property of the AWS::EC2::Subnet resource.
Why it's wrong here
'TagSpecifications' is used for EC2 instances and some other EC2 resources, but for 'AWS::EC2::Subnet', the correct property is 'Tags'. This is a common point of confusion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse 'TagSpecifications' (used for EC2 instances) with the 'Tags' property (used for subnets and many other resources). Always check the specific resource documentation.
Trap categories for this question
Similar concept trap
'TagSpecifications' is used for EC2 instances and some other EC2 resources, but for 'AWS::EC2::Subnet', the correct property is 'Tags'. This is a common point of confusion.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- AWS::EC2::Subnet Tags property
- TagSpecifications
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
AWS::EC2::Subnet Tags property
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review aWS::EC2::Subnet Tags property, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Management and Operations — This question tests Network Management and Operations — AWS::EC2::Subnet Tags property.
What is the correct answer to this question?
The correct answer is: Use the 'Tags' property of the AWS::EC2::Subnet resource. — In AWS CloudFormation, the 'AWS::EC2::Subnet' resource supports the 'Tags' property directly, which is a list of tags to associate with the subnet. This property is available for many resources, including subnets. 'TagSpecifications' is used for EC2 instances and some other resources, but for subnets, 'Tags' is the correct and standard property.
What should I do if I get this ANS-C01 question wrong?
Review aWS::EC2::Subnet Tags property, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS::EC2::Subnet Tags property
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Last reviewed: Jun 20, 2026
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