Introduction Flashcards
What is Cloud Computing?
Cloud Computing is an on demand delivery of IT resources over the Internet in a pay as you go pricing model.
What are the advantages of moving to the cloud?
Agility (teams can experiment and innovate more quickly and frequently.
Cost Savings (pay for what you use, lower upfront expenses).
Elasticity (easily scale to the needs of the business).
Innovate faster (ability to focus on business differentiators, not infrastructure).
Go Global in Minutes (most extensive, reliable, and secure global cloud infrastructure).
What are the three main Service Models of Cloud Computing?
Infrastructure as a Service (IaaS)
Platform as a Service (PaaS)
Software as a Service (SaaS)
What are the two types of AWS Certification Exams?
Role-based certifications which align to the roles and levels and Specialty certifications which align to domain
expertise.
What are the Cloud Computing Deployment models?
Cloud Computing Deployment models are public, private, community, and hybrid.
How did Cloud’s compute evolve?
Cloud’s compute evolved from Physical Machines, Virtual Machines (VMs), Containers, and now Serverless computing.
What are the three fundamental drivers of cost with AWS?
- Compute - charged per hour/second
- Storage - charged per GB
- Data Transfer - outbound aggregated charge, inbound no charge per GB
True or false: AWS charges more as it grows.
False
True or false: AWS free tier enables you to gain free hands-on experience with the AWS platform, products and services. Free for 1 year for new customers.
True.
What is an AWS Region?
A geographical area that provides full redundancy and connectivity to the network.
How many availability zones are in a region?
Two or more.
What is an availability zone?
A fully isolated partition of the AWS infrastructure consisting of discrete data centers.
What are AWS data centers?
Designed for security, data centers are where the data resides and data processing occurs.
A data center typically has 50,000 to 80,000 servers.
Which two things does the AWS Global Infrastructure consist of?
Regions and availability zones.
Edge locations and regional edge caches do what?
Improve performance by caching content closer to users.
What is the purpose of an Internet Gateway (IGW)?
Provides a direct connection between resources in a Virtual Private Cloud (VPC) and the internet.
What is the purpose of a NAT Gateway?
Allows resources in a private subnet (with no direct access to the internet) to send traffic to the internet but blocks incoming traffic from the internet.
What is the difference between Internet Gateways (IGW) and NAT Gateways?
Internet Gateways allow both inbound and outbound traffic for public subnets. NAT allows only outbound traffic from private subnets to the internet.
What is the difference between a Network Access Control List (NACL) and a Security Group?
A Network Access Control List is a stateless firewall that controls inbound and outbound traffic at the subnet level.
A Security Group acts as a virtual firewall for controlling inbound and outbound traffic at the instance level.
