CloudFront and Traffic Management Concepts

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Questions and Answers

Which factor is primarily concerned with maintaining operations during hardware or software failures?

Fault tolerance (correct)

Scalability

Recoverability

Performance optimization

Which type of load balancer operates at the OSI Application Layer 7?

Classic Load Balancer

Application Load Balancer (correct)

Global Load Balancer

Network Load Balancer

Which of the following is NOT an optional EC2 Auto Scaling configuration?

Predictive scaling

Network scaling (correct)

Scheduled scaling

Dynamic scaling

What is the primary purpose of using CloudWatch metrics in load balancing?

To create alarms for actions based on performance metrics Signup and view all the answers

Which EC2 Auto Scaling configuration is required to determine the scaling group's capacity limits?

Min, Desired, Max capacity Signup and view all the answers

What is the main role of CloudTrail logs in load balancer monitoring?

To track API interactions including timing and user information Signup and view all the answers

What is the primary goal of the AWS Well-Architected Framework's Operational Excellence pillar?

To conduct operations using code and prepare for potential failures. Signup and view all the answers

Which method directly impacts the ability to perform instant crash recovery in a primary database?

Implementing log files for every read operation. Signup and view all the answers

What is meant by the term 'Mean Time to Repair (MTTR)'?

It refers to the time taken to resolve an outage and return the system online. Signup and view all the answers

Which statement accurately conveys a strategy under the Cost Optimization pillar of the AWS Well-Architected Framework?

Measure efficiency and monitor expenditures to manage costs. Signup and view all the answers

What key principle must be followed to improve reliability in AWS Well-Architected Framework?

Implement automation to manage change and reduce system downtime. Signup and view all the answers

What is indicated by the term 'Mean Time Between Failures (MTBF)'?

The average duration a system operates before failing. Signup and view all the answers

What does a CIDR block size of /16 allow in terms of address allocation?

65536 addresses Signup and view all the answers

What role do Network ACLs play in a VPC configuration?

Allow and deny actions at the subnet level Signup and view all the answers

Which characteristic describes security groups in a VPC?

They are closed off by default but allow all outbound traffic. Signup and view all the answers

What is the function of the presentation layer in the OSI model?

Managing encryption and data formatting for the application layer. Signup and view all the answers

Which of the following is NOT a reserved IP address?

Custom internal communication address Signup and view all the answers

In Route 53 routing, what distinguishes weighted routing from simple routing?

Weighted routing allows configuration of frequency for different responses. Signup and view all the answers

Which of the following factors should be considered when choosing a region in AWS?

Data governance and laws Signup and view all the answers

What is a core principle of AWS's pricing philosophy?

Pay for what you use Signup and view all the answers

Which of the following AWS services is charged when launched by autoscaling?

EC2 Signup and view all the answers

Which of the following statements about AWS support plans is correct?

The Business plan includes urgent support 24/7 Signup and view all the answers

What is primarily the responsibility of the customer under the Shared Responsibility Model?

Securing client data and resources on AWS Signup and view all the answers

Which component is involved in the AWS Trusted Advisor service?

Performance and security optimization Signup and view all the answers

What is the primary role of AWS CloudFront in a CDN service?

To serve content from edge locations to reduce latency Signup and view all the answers

What are some of the services available at no charge in AWS?

Amazon VPC, CloudFormation, and IAM Signup and view all the answers

Which EC2 pricing model is most suitable for applications with flexible start and end times that can sustain interruptions?

Spot Signup and view all the answers

Which tool should an AWS user employ to create and manage encryption keys?

KMS Signup and view all the answers

In the context of AWS, what does TCO stand for, and what does it encompass?

Total Cost of Ownership, including server, storage, network, and IT labor Signup and view all the answers

What is a key feature of Amazon RDS Read Replicas?

They offload read workloads from the main database instance. Signup and view all the answers

Which of the following correctly describes the function of Route 53?

DNS service that routes end users to internet applications Signup and view all the answers

What type of storage does Amazon S3 Glacier provide?

Low-cost storage for long-term data archiving. Signup and view all the answers

Which of the following is a characteristic of Elastic File System (EFS)?

Automatically scales as files are added or removed. Signup and view all the answers

What challenges are associated with using traditional relational databases?

Server maintenance and software management. Signup and view all the answers

In which use case would Amazon DynamoDB be most advantageous?

Handling a high volume of read and write operations with various item attributes. Signup and view all the answers

Which AWS service is specifically used for container orchestration?

EKS Signup and view all the answers

What is a limitation of using the Standard-Infrequent Access storage class in S3?

There are high retrieval costs associated with it. Signup and view all the answers

Which step is NOT required when launching EC2 instances?

Select a dedicated server location Signup and view all the answers

Study Notes

Web Services and Cloud Adoption

Web service formats include XML and JSON.
AWS Cloud Adoption Framework consists of Business (focus on people and governance) and Technical areas (platform, security, operations).

AWS Economics and Billing

Fundamental AWS costs involve compute (charged by hour/second), storage (per GB), and data transfer (outbound charged per GB).
AWS pricing philosophy promotes the concept of paying for usage, incentivizing volume usage and reservations.
Services offered at no charge include Amazon VPC, Elastic Beanstalk, Auto Scaling, AWS CloudFormation, and AWS IAM, while EC2 launched by Auto Scaling incurs charges.
Total Cost of Ownership (TCO) includes server, storage, network, and IT labor costs.

AWS Support Options

Technical Account Manager (TAM) provides proactive guidance, available only through the Enterprise Support plan.
AWS Support Concierge assists with billing and account-related inquiries.
AWS Trusted Advisor offers warnings and highlights issues needing correction.
Support plans range from Basic (no case support) to Enterprise (critical issues, 15-minute response time).

AWS Global Infrastructure

Choosing AWS regions is influenced by data governance, latency, service availability, and costs.
Points of presence include edge locations (for reduced latency) and regional edge caches (for infrequent content access).
AWS services:
- RDS for scalable databases.
- Aurora supports MySQL and PostgreSQL with high performance.
- DynamoDB is a NoSQL database with low-latency performance.
- CloudFront for global content delivery with low latency.

Shared Responsibility Model

Security responsibilities differ between customer (data, platform, IAM, etc.) and AWS (hardware, software infrastructure).
AWS account access requires specific credentials, such as access key IDs and IAM usernames.
Steps to secure a new AWS account include creating IAM users, enabling MFA, and utilizing CloudTrail for monitoring.

Networking and Content Delivery

IP address types differentiate between IPv4 (32 bits) and IPv6 (128 bits).
Virtual Private Cloud (VPC) creates isolated networks unique to the user.
Security groups operate on instance levels and are stateful, while Network ACLs function at the subnet level and are stateless.
AWS Route 53 offers various routing policies, including simple and latency-based routing.

Compute Services

Categories of AWS compute services include Infrastructure as a Service (EC2), serverless (Lambda), and container computing (ECS, EKS).
EC2 pricing models include on-demand, spot, reserved, and dedicated.
Important EC2 launch decisions include selecting an AMI, instance type, and network settings.

Storage Solutions

Types of EBS Volumes include Solid State Drives (SSD) and Hard Disk Drives (HDD).
S3 provides object storage suitable for scalability and performance.
EBS is block storage designed for high performance with EC2 instances, while EFS offers scalable file storage solutions.
S3 Glacier is used for long-term data archiving, with various retrieval options available depending on immediacy required.

Database Management

Relational databases face challenges such as server maintenance and scaling limits.
RDS is suited for complex queries and high durability, enabling read replicas to distribute read queries.
DynamoDB offers unlimited storage and scalable throughput, while Redshift handles complex analytic queries with standard SQL support.

Cloud Architecture Principles

AWS Well-Architected Framework emphasizes operational excellence, security, reliability, performance efficiency, and cost optimization.
Trusted Advisor monitors adherence to these principles and suggests optimizations.
Important calculations for system reliability include Mean Time to Failure (MTTF) and Mean Time to Repair (MTTR).

Autoscaling and Monitoring Tools

Different types of load balancers include Application Load Balancer, Network Load Balancer, and Classic Load Balancer, each serving different traffic protocols.
Monitoring tools for load balancers include CloudWatch metrics and CloudTrail logs for API interaction insights.
Configuring EC2 Auto Scaling involves decisions about AMIs, instance types, security groups, and specific scaling policies (scheduled, dynamic, or predictive).

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Description

This quiz covers key concepts related to CloudFront and traffic management strategies. Topics include latency routing, geolocation, failover mechanisms, and the role of CloudFront as a CDN service. Test your understanding of these critical networking principles.