A user has created a VPC with public and private subnets using the VPC Wizard. The VPC has CIDR 20.0.0.0/16. The
private subnet uses CIDR 20.0.0.0/24. Which of the below mentioned entries are required in the main route table to allow
the instances in VPC to communicate with each other?
A.
Destination : 20.0.0.0/24 and Target : VPC
B.
Destination : 20.0.0.0/16 and Target : ALL
C.
Destination : 20.0.0.0/0 and Target : ALL
D.
Destination : 20.0.0.0/16 and Target : Local
Explanation:
A user can create a subnet with VPC and launch instances inside that subnet. If the user has created a public private
subnet, the instances in the public subnet can receive inbound traffic directly from the Internet, whereas the instances in
the private subnet cannot. If these subnets are created with Wizard, AWS will create two route tables and attach to the
subnets. The main route table will have the entry “Destination: 20.0.0.0/24 and Target: Local”, which allows all instances
in the VPC to communicate with each other.