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AWS Cloud Practitioner Essentials > Basic Terms > Flashcards

Basic Terms Flashcards

1
Q

Cloud Computing

A

On-Demand delivery of IT resources with pay-as-you-go pricing.

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2
Q

On-Demand Delivery

A

AWS has the resources you need when you need them.

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3
Q

Private-Cloud Deployment

A

On-Premises Deployment

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4
Q

Hybrid Deployment

A

Cloud-based resources are connected to on-premises infrastructure.

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5
Q

Mulitenancy

A

Sharing underlying hardware between virtual machines

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6
Q

CaaS (Compute as a Service)

A

Consumption-based (pay-per-use) infrastructure model that provides on-demand processing resources for general & specific workloads.

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7
Q

What is Dynamic Scaling?

A

Scales based upon demand.

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8
Q

What is Predictive Scaling?

A

Automatically schedules right number of EC2 instances based upon predicted demand.

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9
Q

What type of application has resources and services tightly coupled where if one service fails they all fail?

A

Monolithic Application

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10
Q

What type of application has loosely coupled services and if single component fails, other components continue to work because they are communicating with each other.

A

Microservice

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11
Q

What are Containers?

A

Image files that contain everything needed to run
software, processes, & workflows.

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12
Q

What is an Origin

A

Server from which CloudFront gets your files.

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13
Q

What is a Subnet?

A

Section of VPC where you group resources based on security or operational needs.
Can be public or private.

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14
Q

What is an Internet Gateway?

A

Connection between VPC & Internet.

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15
Q

What is Virtual Private Gateway?

A

Enables you to establish VPC connection b/w you & private network (ex: on-premises data-center or internet corporate network).
Allows for traffic into VPC if coming form approved network.

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16
Q

What is difference between public & private subnets?

A

Public Subnets have resources that need to be accessible by public.

Private Subnets have resources that can only be accessible through your private network.

17
Q

Can a private and a public subnet communicate with eachother?

A

Yes.

18
Q

What is a Packet?

A

Data unit sent over internet or network.

19
Q

What is a Network ACL?

A

Virtual firewall that controls that controls inbound & outbound traffic at subnet level using stateless packet filtering.

20
Q

What is Stateless?

A

Network ACL remembers nothing and checks packets to and from subnet.

21
Q

What is a Security Group?

A

Virtual firewall that controls inbound & outbound traffic for Amazon EC2 instance using stateful packet filtering.
They are stateful & deny inbound traffic but allow outbound traffic by default.

22
Q

What is Stateful?

A

Security Group checks packet first time but will not check second time because it will remember it.

23
Q

What is a DNS (Domain Name System)?

A

Turns domain names into IP Address so you can access websites.

24
Q

What is DNS Resolution?

A

Translating a domain name to an IP Address.

25
Q

What is a CDN?

A

Content Delivery Network:
Network that delivers edge content to users based on their geographic location.

26
Q

What is an Instance Store?

A

Disk storage physically attached to host computer for EC2 instance.
If instance is terminated/instance store loses data

27
Q

What is Object Storage?

A

Each object consists of data, metadata, & key.

28
Q

What is Metadata?

A

Contains information about what data is, how it is used, object size, etc . . .

29
Q

What is a Relational Database?

A

Data stored in way that relates it to other pieces of data.

30
Q

What is Encryption at Rest?

A

Protecting data while it’s stored.

31
Q

What is Encryption in Transit?

A

Protecting data while it is being sent & received.

32
Q

What is the Root User?

A

User that was used to create AWS account & has complete access to all AWS services & resources in account.

33
Q

What are Service Control Policies (SCPs)?

A

Allow you to place restrictions on AWS services, resources, & individual API actions that users & roles in each account can access.

34
Q

What is a Denial-of-Service Attack (DoS)?

A

Deliberate attempt from an attack from a single source to make website or application unavailable to users.

35
Q

What is a Distributed Denial-of-Service Attack (DDoS)?

A

Deliberate attempt from an attack from multiple sources to make a website or application unavailable to users.

36
Q

What is an Internet Gateway?

A

Connection b/w VPC & Internet by allowing public traffic from internet to access VPC.

37
Q

What is Elastic Load Balancing?

A

Distributes incoming traffic across multiple targets, s/a EC2 Instances.

AWS Cloud Practitioner Essentials (14 decks)

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