AWS Certified Advanced Networking Specialty Practice Exam

What default component is created when a new Virtual Private Cloud (VPC) is established?

1. A main route table

2. A security group

3. An internet gateway

4. A NAT gateway

The correct answer is: A main route table

When a new Virtual Private Cloud (VPC) is established in AWS, a main route table is automatically created by default. This route table serves as the primary routing mechanism for all subnets within the VPC that do not have an explicitly associated route table. The main route table typically contains routes for local VPC traffic, allowing instances in different subnets within the VPC to communicate with each other efficiently. The main route table plays a critical role in managing traffic flow and ensuring proper connectivity within the VPC. While other components like security groups, internet gateways, and NAT gateways are also essential for your VPC's network configuration, they are not created by default. For example, security groups need to be defined and associated with instances for traffic control, while internet gateways and NAT gateways must be created and attached separately to allow internet access. Thus, the creation of a main route table when a new VPC is launched is fundamental for establishing routing capabilities, making it the correct choice in this context.