Cloud Computing Characteristics
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Questions and Answers

What is the main characteristic of 'Measured service' in cloud computing?

  • Resources can be scaled up or down rapidly
  • Resources are shared among users
  • Resources usage is monitored and measured (correct)
  • Users can provision and manage resources

    • Which type of cloud deployment model is suitable for high-security and critical systems?

  • Community Cloud
  • Private Cloud (correct)
  • Hybrid Cloud
  • Public Cloud

    • What is the main benefit of a Hybrid Cloud?

  • Cost efficiency
  • High security
  • Economical compared to a private cloud
  • Utilizing private/community cloud for critical data and public cloud for cost efficiency (correct)

    • What is the concept of 'Multi-tenancy' in cloud computing?

    <p>Resources are shared among multiple organizations</p> Signup and view all the answers

    What is the primary advantage of a Community Cloud?

    <p>Serves a specific community with a common goal</p> Signup and view all the answers

    Which cloud deployment model is open to the public and remotely accessed?

    <p>Public Cloud</p> Signup and view all the answers

    What is DynamoDB's primary key's main function?

    <p>To uniquely identify items</p> Signup and view all the answers

    What is the primary reason IAM becomes critical in cloud computing?

    <p>Due to the lack of network control</p> Signup and view all the answers

    What is the purpose of IAM groups in AWS?

    <p>To facilitate easier user management</p> Signup and view all the answers

    What is the function of IAM policies in AWS?

    <p>To define resource access and permissions</p> Signup and view all the answers

    What is the benefit of auto-partitioning in DynamoDB?

    <p>Scalability as dataset size grows</p> Signup and view all the answers

    What is the purpose of IAM in AWS?

    <p>To manage access to AWS resources</p> Signup and view all the answers

    What is the maximum size of an object that can be stored in an Amazon S3 bucket?

    <p>5 TB</p> Signup and view all the answers

    Which Amazon S3 storage class is designed for frequently accessed data?

    <p>Standard</p> Signup and view all the answers

    What is the primary benefit of using Amazon S3 Intelligent-Tiering storage class?

    <p>Automated cost-effective tiering based on access patterns</p> Signup and view all the answers

    What is a key consideration when designing a database?

    <p>Scalability</p> Signup and view all the answers

    What is an example of a use case for Cloud Object Storage?

    <p>Media Hosting</p> Signup and view all the answers

    What is the primary benefit of using Amazon S3 Glacier Deep Archive storage class?

    <p>Low-cost storage for long-term retention and digital preservation</p> Signup and view all the answers

    What is the primary function of a Security Group?

    <p>To filter traffic to instances</p> Signup and view all the answers

    What is the default behavior of a Security Group?

    <p>Deny all inbound, allow all outbound</p> Signup and view all the answers

    What is the primary difference between a NAT Gateway and a NAT Instance?

    <p>NAT Gateways have better availability and less administrative effort</p> Signup and view all the answers

    What is the primary function of an Internet Gateway?

    <p>To facilitate communication between VPC instances and the internet</p> Signup and view all the answers

    What is the relationship between a subnet and a Network Access Control List (ACL)?

    <p>Each subnet must be associated with one Network ACL</p> Signup and view all the answers

    What is the default behavior of a Network Access Control List (ACL)?

    <p>Allow all IPv4 traffic</p> Signup and view all the answers

    What is a benefit of caching in apps?

    <p>Reduces the time users wait for a response from the app</p> Signup and view all the answers

    At which layers can caching be used to speed up an app?

    <p>At multiple layers, including operating systems, networks, web apps, and databases</p> Signup and view all the answers

    What is the purpose of a CDN like Amazon CloudFront?

    <p>To store copies of data closer to users</p> Signup and view all the answers

    What type of attack can CloudFront protect apps on AWS from?

    <p>DDoS mitigation</p> Signup and view all the answers

    What is the role of a DNS service like Amazon Route 53?

    <p>To connect users to CloudFront</p> Signup and view all the answers

    What is an example of content that can be cached in an edge cache?

    <p>Web content</p> Signup and view all the answers

    Study Notes

    Route Tables and Routes

    • Route tables define rules for managing network traffic within a subnet.
    • Each route table includes a default local route, facilitating intra-VPC communication.

    VPC Networking

    • Internet Gateways: Allow VPC instances to communicate with the internet and serve as the target for internet-routable traffic in route tables.
    • NAT Gateway: Enables internet access for private subnet instances. It's a managed service, ensuring high availability and reducing administrative tasks.
    • NAT Instances: Less preferred option for providing internet access in public subnets, featuring lower availability and higher maintenance.

    Security Groups

    • Function as virtual firewalls at the instance level, regulating inbound and outbound traffic.
    • Each instance can have multiple security groups within the same subnet, facilitating tailored access controls.
    • Default settings deny all inbound traffic while permitting all outbound traffic.

    Network Access Control Lists (NACLs)

    • Provide an extra security layer for VPCs, functioning as subnet firewalls.
    • Each subnet must be associated with a NACL, which can have multiple subnets linked to it but only one associated NACL.
    • NACLs have separate inbound and outbound rules, allowing specific traffic management.

    Amazon S3 (Simple Storage Service)

    • Offers object-level storage with exceptional durability (11 nines).
    • Supports virtually unlimited objects per bucket, with individual object sizes up to 5 TB.
    • Features different storage classes tailored for specific data use cases.

    Amazon S3 Storage Classes

    • Standard: Optimal for frequently accessed data with high durability and availability.
    • Intelligent-Tiering: Automatically adjusts to the most cost-effective tier based on access patterns.
    • Standard-IA: Cost-effective for infrequent access yet allows quick retrieval.
    • One Zone-IA: Low-cost alternative with storage located in a single Availability Zone.
    • Glacier and Glacier Deep Archive: Designed for secure, durable long-term data archiving, with Glacier Deep Archive offering the lowest costs.

    Common Use Cases of Cloud Object Storage

    • Backup and storage solutions, application and media hosting, software delivery.

    Database Considerations

    • Scalability: Essential for handling increased data and traffic without degrading performance.
    • Total storage requirements: Determined by overall data volume and space needs.
    • Key features of DynamoDB:
      • NoSQL tables with flexible attributes.
      • Supports high requests per second via auto-partitioning.
      • Allows querying with Global and Local Secondary Indexes.

    IAM Basics

    • Covers identification management, authentication, authorization, access management, accountability, and user activity monitoring.
    • Embodies critical importance in cloud environments due to extended trust boundaries into cloud service providers.

    AWS IAM

    • Comprehensive service for managing resource access in AWS.
    • Includes users, groups, policies, and roles to facilitate streamlined permission management.

    Cloud Deployment Models

    • Public Cloud: Open-access infrastructure managed by vendors (e.g., AWS, Google Cloud).
    • Private Cloud: Restrained access, typically for organizational needs, located on-premises or off-premises.
    • Community Cloud: Shared infrastructure among organizations with a common goal, often more economical than private clouds.
    • Hybrid Cloud: Combines private/community cloud benefits with public cloud scalability and cost efficiency.

    Benefits of Caching

    • Enhances application speed by storing frequently accessed data in memory, reducing response times.
    • Lowers processing time for data access, beneficial for apps with high read frequencies (e.g., social networks).

    Caching Across Data Journey

    • Implements caching at multiple stages (operating systems, networks, applications) to expedite responses.
    • Utilizes CDNs and DNS for faster content delivery and data access.

    Edge Caching

    • Involves using CDNs like Amazon CloudFront to store copies of data closer to users, accelerating request fulfillment and reducing latency.
    • Protects applications from DDoS attacks by monitoring unusual traffic and maintaining uninterrupted service through services like Amazon Route 53.

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    Description

    This quiz covers the essential characteristics of cloud computing, including rapid elasticity, measured service, on-demand self-service, and resource pooling. Test your knowledge of cloud computing concepts and multi-tenancy in cloud security. Explore the different cloud deployment models, including public, private, and hybrid clouds.

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