What is cloud computing?
Using remote servers on the internet to manage and process data.
Or…
The network of data centers that store and compute information available
through the Internet. It includes the complex web of software, computers, networks and security systems involved
What is a dedicated server?
Using a physical machine dedicated to a single business. Cons: expensive, high maintenance. Pros: full control over your server, can have high security.
What is a virtual private server?
Physical machine dedicated to a single business that is virtualized into sub-machines. Pros: full control over your server, can have high security.
What is shared hosting?
One physical machine shared by different users. Pros: cheap. Cons: Limited capacity.
What is cloud host?
Multiple virtual machines that act as one system. The system is abstracted into multiple cloud services.
What is a cloud service provider?
A company that provides multiple cloud services that can be chained together to create cloud architectures.
What are the benefits of cloud computing?
- Cost-effective: no up-front cost, pay for what you use.
- Global: Launch workloads from anywhere in the world.
- Secure: Secure by default. Granular control over access.
- Reliable: Data backup, disaster recovery
- Scalable: Can increase or decrease on demand
- Elastic: can automate scaling.
What are the 4 main categories of IaaS (Infrastructure as a Service) as provided by cloud service providers?
- Compute: virtual computer that can run application, programs and code.
- Storage: virtual hard-drive to store files.
- Networking: virtual network to define internet connections or isolations.
- Databases: virtual databases.
What are the types of cloud computing?
- SaaS: Sofware as a Service. For customers (ex.: Office 365, gmail).
- PaaS: Platform as a Service. For developers to manage deployment (ex: Google App engine).
- IaaS: Infrastructure as a Service. For admins. Provides access to cloud IT (ex.: AWS, Azure, GCP).
What is the google shared responsibility model?
If you can configure it, it is your responsibility.
In SaaS customers have less responsibility. In IaaS, users have more responsibility
What are the main customer responsibilities in cloud computing?
- Configuration of manage services or third party software such as platforms, apps and IAMs.
- Configuration of virtual Infrastructure: OS, Network, Firewall.
- Configuration of security for data: client data encryption, server encryption, networking traffic, customer data.
What are the cloud computing deployment models?
- Public cloud: cloud native, everything built on the cloud provider.
- Private cloud: on premisse, everything built on the companies dedicated severs. Virtual private servers (VMs and granular IAMS).
- Hybrid: Use both public and private, connecting via VPN
- Cross-cloud: multiple cloud providers.
Which companies are most likely to use private cloud?
Heavy regulated companies with sensitive information, such as public sector, hospital, insurance companies.
Which companies are most likely to use hybrid clould deployment model?
Companies with legacy systems, such as banks, large professional services providers.
Which companies are most likely to use public cloud?
New projects and companies such as start ups and SaaS.
What is TCO?
The total cost of ownership. Can be divided into Capital Expenditure (CAPEX) and Operational Expenditure (OPEX).
What is Capex?
Capital Expenditure. Spending money upfront in physical infrastructure. On premises systems have high Capex costs. Cloud IT minimizes Capex
What are the main components of Capex in IT infrastructure?
- Servers (computers).
- Storage (hard drives).
- Network (routers, cables).
- Back up.
- Datacenter.
- Technical personal.
What is Opex?
Operational Expenditure. Non physical costs. Both cloud and on prem have Opex, but cloud IT shifts from Capex to Opex, allowing to try products or services without investing in equipment.
What are the main components of Opex in IT infrastructure
- Leasing software.
- Training.
- Cloud support.
- Comput usage in the cloud.
- Storage usage in the cloud.
What is cloud technology/computing?
The technology and processes needed to store, manage, and
access data that is transferred over the Cloud (as opposed to data that remains on your computer’s hard drive).
What is digital transformation?
When an organization takes advantage of new technologies to redesign
and redefine relationships with their customers, employees, and partners.
What is data?
Any information that is useful to an organization. Can be numbers on a spreadsheet, text in
an email, audio or video recordings, images, or even ideas in employees’ heads. Includes internal and
external information.
What is the google cloud geographic scope
Google resources are contained in in google’s data centers around the globe. Each data center location is a region and each region is a collection of zones.
_______________________________
| Region |
| Static External IP Addresses |
||—————————————||
|| Zone a | Zone b ||
|| ————– |_____________||
||VMs | Zone C ||
||Disks |_____________||
|——————————————-|
Global resources include preconfigured disk images, disk snapshots, and networks. Some resources can be accessed only by resources that are located in the same region. These regional resources include static external IP addresses. Other resources can be accessed only by resources that are located in the same zone. These zonal resources include VM instances, their types, and disks.
