Cloud Concepts

Cloud Types

1. Public Cloud:
   Here the vendors allow public to use depending on their demand. The customers cannot access hardware or any back end . But they can know in which region the service resides . The vendors will maintain the service . Again the customers can access it anyone round the world if he/she has an internet connection. For example, people use azure portal(vendor) to work with their services

2. Private Cloud: The resources are not shared to general public. A company creates a their service and keeps it with it's organization and everything is done by them . For example, Microsoft manages their team and company by this private cloud.

3. Hybrid Cloud : Mixed of both Public and Private

Some terms:

1. On demand resourcing: When you need something, you will get that. It is like filling a form and submitting it and then get a verification mail
2. Consumption based: You pay what you use
3. Scalable & agility: Scaling "up and down" to increase or decrease computer powers and to "in and out" means adding more vms or removing them
4. Economy of scale: Cost is reduced for companies
5. High available: Very available throughout regions
6. Flexible & elasticity: You can choose how much and how long you need things without being worried
7. Shared infrastructure: Reduces space for hardware
8. Security: Very much secured

Cloud Service Models

1. SaaS: You can use the service but cannot change anything. For example, Google Gmail

1. PaaS: You can get access to the operating system, software but not Vms or others.

1. IaaS: Can access software, operating system , cm but not hardware.

Offers highest level of customization .

1. DRaaS (Disaster recovery as service)
2. CaaS (Communication recovery as service)
3. MaaS ( Monitoring as a service)