A DevOps Engineer Is Writing an AWS CloudFormation Template to Stand

question 125

Multiple Choice

A DevOps engineer is writing an AWS CloudFormation template to stand up a web service that will run on Amazon EC2 instances in a private subnet behind an ELB Application Load Balancer. The Engineer must ensure that the service can accept requests from clients that have IPv6 addresses. Which configuration items should the Engineer incorporate into the CloudFormation template to allow IPv6 clients to access the web service?

• A) Associate an IPv6 CIDR block with the Amazon VPC and subnets where the EC2 instances will live. Create route table entries for the IPv6 network, use EC2 instance types that support IPv6, and assign IPv6 addresses to each EC2 instance.
• B) Replace the Application Load Balancer with a Network Load Balancer. Associate an IPv6 CIDR block with the Virtual Private Cloud (VPC) and subnets where the Network Load Balancer lives, and assign the Network Load Balancer an IPv6 Elastic IP address.
• C) Assign each EC2 instance an IPv6 Elastic IP address. Create a target group and add the EC2 instances as targets. Create a listener on port 443 of the Application Load Balancer, and associate the newly created target group as the default target group.
• D) Create a target group and add the EC2 instances as targets. Create a listener on port 443 of the Application Load Balancer. Associate the newly created target group as the default target group. Select a dual stack IP address, and create a rule in the security group that allows inbound traffic from anywhere.

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Definitions:

Operant Conditioning

A method of learning that employs rewards and punishments for behavior, which increases or decreases the likelihood of a behavior being repeated.

Young Children

A phase of early childhood encompassing the ages from infancy through early elementary years, typically considered to be ages 2-6.

Reinforcer

In behaviorism, any event that strengthens or increases the likelihood of a behavior being repeated.

Senses

The physiological capacities of organisms that provide data for perception, including sight, sound, taste, touch, and smell.