Learn about the essential components that are automatically provisioned when you create a new Virtual Private Cloud (VPC) in Amazon Web Services. Understand VPC networking fundamentals.
Table of Contents
Question
Which of the following components are automatically created for you when you create a VPC? (Select THREE.)
A. A network ACL
B. A security group
C. A public subnet
D. A private subnet
E. A main route table
F. An EC2 instance
Answer
A. A network ACL
B. A security group
E. A main route table
Explanation
When you create a VPC, a main route table, a default security group, and a default network ACL are created for you automatically.
When you create a new Virtual Private Cloud (VPC) in Amazon Web Services, the following three components are automatically created for you:
A. A network ACL (Access Control List)
- A default network ACL is created that allows all inbound and outbound IPv4 traffic.
- You can modify the default network ACL or create custom network ACLs to control traffic at the subnet level.
B. A security group
- A default security group is created for the VPC.
- By default, the security group allows all outbound traffic and denies all inbound traffic.
- You can modify the default security group rules or create additional security groups to control traffic at the instance level.
E. A main route table
- A main route table is automatically created and associated with the VPC.
- It controls the routing for all subnets that are not explicitly associated with a custom route table.
- By default, the main route table only contains a local route that enables communication within the VPC.
The other options – a public subnet, a private subnet, and an EC2 instance – are not automatically created when you create a VPC. You need to manually create and configure subnets and launch EC2 instances within your VPC as per your requirements.
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