What is cloud computing? Flashcards
How do websites work?
Clients interact with servers through a network. Both the client and the server have IPs
What is a server composed of?
Computing: CPU
Memory: RAM
Storage: Data
Database: store data in a structured way
Network: routers, switch, DNS server
What are the following in IT?
- Network
- Router
- Switch
Network: cables, routers, and servers connected with each other
Router: a network device that forwards data packets between computer networks. They know where to send your packets on the internet
Switch: takes a packet and sent it to the correct server / client on your network
What are some problems with traditional IT?
- Pay for rent, power, cooling, maintenance
- Adding and replacing hardware takes time
- Limited scaling
- Hire a 24/7 team to care for the infrastructure
What is the definition of cloud computing?
The on-demand delivery of compute power, database storage, applications, and other IT resources.
- Pay-as-you-go pricing
- Can provision exactly the right type and size of computing resources you need
- Can access as many resources as you need almost instantly
- Simple way to access servers, storage, databases, and a set of application services
What are the deployment models of the cloud?
- Private Cloud
- Public Cloud
- Hybrid Cloud
What is a Private Cloud?
- Cloud services used by a single organization, not exposed to the public
- Complete control
- Security for sensitive applications
- Meet specific business needs
What is a Public Cloud?
- Cloud resources owned and operated by a third-party cloud service provider delivered over the Internet.
- Six advantages of Cloud Computing
What is a Hybrid Cloud?
- Keep some servers on premises and extend some capabilities to the Cloud
- Control over sensitive assets in your private infrastructure
- Flexibility and cost-effectiveness of the public cloud
What are the Five Characteristics of Cloud Computing?
On-demand self service:
- Users can provision resources and use them without human interaction from the service
provider
Broad network access:
- Resources available over the network, and can be accessed by diverse client platforms
Multi-tenancy and resource pooling:
- Multiple customers can share the same infrastructure and applications with security and privacy
- Multiple customers are serviced from the same physical resources
Rapid elasticity and scalability:
- Automatically and quickly acquire and dispose resources when needed
- Quickly and easily scale based on demand
Measured service:
- Usage is measured, users pay correctly for what they have used
What are the Six Advantages of Cloud Computing?
Trade capital expense (CAPEX) for operational expense (OPEX)
- Pay On-Demand: don’t own hardware
- ReducedTotal Cost of Ownership (TCO) & Operational Expense (OPEX)
Benefit from massive economies of scale
- Prices are reduced as AWS is more efficient due to large scale
Stop guessing capacity
- Scale based on actual measured usage
Increase speed and agility
Stop spending money running and maintaining data centres
Go global in minutes: leverage the AWS global infrastructure
What are the problems solved by the cloud?
Flexibility: change resource types when needed
Cost-Effectiveness: pay as you go, for what you use
Scalability: accommodate larger loads by making hardware stronger or adding additional nodes
Elasticity: ability to scale out and scale-in when needed
High-availability and fault-tolerance: build across data centres
Agility: rapidly develop, test and launch software applications
What are the types of Cloud Computing?
Which processes are managed locally/by others with the types of cloud computing?
What are some examples of:
- IaaS
- PaaS
- SaaS
What is the pricing model of the AWS cloud? What are its fundamentals?
What comprises the AWS Global Infrastructure?
What are AWS regions?
Most AWS services are ____-scoped
region-scoped
What things must you keep in mind for choosing an AWS region?
Regions are comprised of
Availability Zones
What are AZs?
What are AWS Edge Locations?
What are some AWS Global services? Regional services?
