AVirtual Private Cloud (VPC) is an isolated network environment that is completely isolated from each other. The following statements about VPC are correct______. (Number of correct answers: 2)

AVirtual Private Cloud (VPC) is an isolated network environment that is completely isolated from each other. The following statements about VPC are correct______. (Number of correct answers: 2)
A . Each VPC has an independent tunnel ID, and a tunnel ID corresponds to a virtualized network.
B . Subnets can be divided like the traditional network environment. Different cloud servers within each subnet are connected by the same router, and different subnets are interconnected by switches.
C . The internal networks of different VPCs are completely isolated and can be interconnected through IP addresses mapped to the outside.
D . ECS instances in a VPC use security group firewalls for Layer 2 network access control.

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Answer: A C