Helping Hand Questions for CLF-C02

According to the AWS shared responsibility model, AWS is responsible for the security of the cloud, while customers are responsible for the security in the cloud. This means that AWS is responsible for the physical servers, networking, and operating system that run Lambdafunctions, while customers are responsible for the security of their code and AWS IAM to the Lambda service and within their function1. Customers need to manage the code within the Lambda function, such as writing, testing, debugging, deploying, and updating the code, as well as ensuring that the code does not contain any vulnerabilities or malicious code that could compromise the security or performance of the function23. References: 2: AWS Lambda - Amazon Web Services (AWS), 3: AWS Lambda Documentation, 1: Amazon CLF-C02: What is customer responsibility under AWS … - PUPUWEB

AWS Budgetsallows users to set custom cost and usage budgets and receive notifications when they exceed their thresholds. It provides detailed reports on cost and usage data for the past and current months, enabling the finance team to track and analyze spending.

AWS Budgets can automatically generate cost and usage reports, which can help the finance team plan ahead for each quarter based on historical data.

Why other options are not suitable:

A. Amazon Detective: A security service for analyzing and investigating AWS account activity for security purposes, not cost tracking.

B. AWS Pricing Calculator: A tool to estimate costs based on expected usage, not for tracking actual past usage.

D. AWS Savings Plans: An offering to save costs on AWS usage; it does not provide cost tracking or reporting features.

On-Demand Instances are the most cost-efficient pricing model for an uninterruptible workload that runs once a year for 24 hours. On-Demand Instances let you pay for compute capacity by the hour or second, depending on which instances you run. No long-term commitments or up-front payments are required. You can increase or decrease your compute capacity to meet the demands of your application and only pay the specified hourly rates for the instance you use1. This model is suitable for developing/testing applications with short-term or unpredictable workloads2. The other pricing models are not cost-efficient for this use case. Reserved Instances and Savings Plans require a commitment to a consistent amount of usage, in USD per hour, for a term of 1 or 3 years. They provide significant discounts compared to On-Demand Instances, but they are not flexible or scalable for workloads that run only once a year12. Spot Instances are the cheapest option, but they are not suitable for uninterruptible workloads, as they can be reclaimed by AWS at any time. They are recommended for applications that have flexible start and end times, or that are only feasible at very low compute prices12. Dedicated Instances are designed for compliance and licensing requirements, not for cost optimization. They are more expensive than the other options, as they run on single-tenant hardware12. References: Amazon EC2 – Secure and resizable compute capacity – AWS, Amazon EC2 - How AWS Pricing Works

AWS Transit Gateway is a network transit hub that you can use to interconnect your VPCs and on-premises networks through a central gateway. AWS Transit Gateway simplifies and scales the connectivity between your on-premises networks and AWS, as you only need to create and manage a single connection from the central gateway to each on-premises network, rather than individual connections to each VPC. You can also use AWS Transit Gateway to connect to other AWS services, such as Amazon S3, Amazon DynamoDB, and AWS PrivateLink12. AWS Transit Gateway supports thousands of VPCs per gateway, and enables you to peer Transit Gateways across AWS Regions3.

The other options are not AWS services or features that can simplify and scale the connectivity between on-premises networks and hundreds of VPCs using AWS Direct Connect. VPC endpoints enable private connectivity between your VPCs and supported AWS services, but do not support on-premises networks4. Amazon Route 53 is a DNS service that helps you route internet traffic to your resources, but does not provide network connectivity5. AWS Secrets Manager is a service that helps you securely store and manage secrets, such as database credentials and API keys, but does not relate to network connectivity