WGU Cloud-Deployment-and-Operations Exam Dumps

Elastic Load Balancing (ELB) should be used to horizontally scale Amazon EC2 instances by distributing incoming traffic across multiple instances, improving availability and fault tolerance. ELB works in conjunction with Auto Scaling groups to add or remove instances based on demand. The WGU Cloud Deployment and Operations Study Guide (Section 3.2, Elastic Load Balancing) notes, 'Elastic Load Balancing distributes traffic across EC2 instances, enabling horizontal scaling as part of an Auto Scaling group to handle increased load efficiently.' Elastic IPs, elastic network interfaces, and Elastic Beanstalk do not provide this scaling functionality.

The `NetworkIn` metric in Amazon CloudWatch should be used to determine the number of bytes received by an EC2 instance across all network interfaces, aiding in proper instance sizing based on inbound traffic. The WGU Cloud Deployment and Operations Study Guide (Section 4.1, CloudWatch Metrics) states, 'The `NetworkIn` metric measures the total number of bytes received on all network interfaces of an EC2 instance, providing critical data for sizing decisions to handle inbound traffic effectively.' NetworkPacketsIn, NetworkOut, and NetworkPacketsOut measure packet counts or outbound data, which are less relevant for this purpose.

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AWS CloudFormation uses YAML and JSON languages to define infrastructure as code (IaC) templates, specifying resources, parameters, and configurations. These formats are human-readable and support the creation of stacks for provisioning AWS resources. The WGU Cloud Deployment and Operations Study Guide (Section 5.3, CloudFormation) states, 'CloudFormation templates can be written in YAML or JSON, both of which are supported for defining infrastructure resources like EC2 instances and S3 buckets.' XML and C# are not supported languages for CloudFormation templates.

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The CloudFormation template feature should be used to specify the AWS resources to be provisioned. A template is a JSON or YAML file that defines the resources (e.g., EC2 instances, S3 buckets) and their configurations for deployment. The WGU Cloud Deployment and Operations Study Guide (Section 5.3, CloudFormation Templates) states, 'The template is the core component of CloudFormation, containing the resource specifications and properties that are provisioned when a stack is created.' Change sets, exports, and stack sets serve different purposes (e.g., previewing changes, sharing outputs, managing multiple stacks).

The Enterprise support plan provides a technical account manager (TAM) and full use of Trusted Advisor, offering proactive guidance and comprehensive access to all checks. This plan is designed for large-scale, mission-critical workloads. The WGU Cloud Deployment and Operations Study Guide (Section 6.4, AWS Support Plans) states, 'The Enterprise support plan includes a dedicated Technical Account Manager and full Trusted Advisor access, providing 24/7 support and proactive optimization recommendations.' Developer, Standard, and Business plans offer limited or no TAM support and partial Trusted Advisor access.