A user has created a VPC with public and private subnets using the VPC wizard. Which of the below
mentioned statements is true in this scenario?
A.
The AWS VPC will automatically create a NAT instance with the micro size
B.
VPC bounds the main route table with a private subnet and a custom route table with a public subnet
C.
The user has to manually create a NAT instance
D.
VPC bounds the main route table with a public subnet and a custom route table with a private subnet
Explanation:
A Virtual Private Cloud (VPC. is a virtual network dedicated to the user’s AWS account. 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 a NAT instance of a
smaller or higher size, respectively. The VPC has an implied router and the VPC wizard updates the main route
table used with the private subnet, creates a custom route table and associates it with the public subnet.
B.
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html
For this scenario, the VPC wizard updates the main route table used with the private subnet, and creates a custom route table and associates it with the public subnet. Otherwise, you’d need to create and associate the route tables yourself.
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That make sense since the main route table mosttimes route local.
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I think you guys are missing the key work in the questions “wizard”!! and if you read the explanation the answer is in the explanation ” If these subnets are created with Wizard, AWS will create a NAT instance of a smaller or higher size, respectively”.
the answer should be A.
Thoughts?
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b
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Even the answer A sense valid, I will go with B
Reason: Creating a VPC with public and private subnets from the wizard creates:
2 subnets which are associated with 2 newly created route tables; private subnet associated with the main route table and public subnet associated with the custom route table.
It also launches a t2.micro NAT instance by default but the user can choose the type of the instance he/she wants while creating.
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reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html
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a
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Right answer: B
It’s not A because what the wizard launches is a NAT gateway by default, not a NAT instance (which you can choose, but it’s not the default option that will be created automatically -as the question states).
C and D are clearly out of discussion.
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