Chapter 6 - Securing the Cloud
Hybrid Cloud
A mixture of public and private clouds. Dedicated servers located within the organization and cloud servers from a third party are used together to form the collective network.
I.a.a.S - Infrastructure as a Service
A service that offers computer networking, storage, load balancing, routing, and VM hosting. More and more organizations are seeing the benefits of offloading some of their networking infrastructure to the cloud.
P.a.a.S. - Platform as a Service
A service that provides various software solution to organizations, especially the ability to develop applications in a virtual environment without the cost or administration of a physical platform.
Community Cloud
Another mix of public and private, but one where multiple organizations can share the public portion. Appeal to orgs that usually have a common form of computing and storing of data. Think of it as a condo ( you own a portion, you share maintenance of common areas, etc)
Hypervisor
It is the core of virtualization. It is the software/hardware combination that makes it possible.
Type 1 Hypervisor Model
Known as bare metal. It is independent of the OS and boots before the OS
Type II Hypervisor Model
Known as hosted. It is dependent on the OS and cannot boot util the OS is up and running.
Sandboxing
Running apps in restricted memory areas.
Virtualization
The creation of a virtual entity, as opposed to a true or actual entity. It is a key component of cloud computing. It makes it possible by abstracting the hardware and making it available to the virtual machines.
Private Cloud
The security administrator has more control over the data and infrastructure. A limited number of people have access to the cloud, and they are usually located behind a firewall of some sort in order to gain access to the cloud. Think of it as a house (you own it; you're responsible for the maintenance, utilities, etc)
Public Cloud
When a service provider offers applications and storage space to the general public over the Internet. A couple of examples of this include free, web-based email services and pay-as-you-go business-class services. Benefits include low (or zero) cost and scalability. Providers of public cloud space include Google, Rackspace, and Amazon. Think of it as a hotel (you're using only a small part of it, you have very little responsibility for the structure)
X.a.a.S
When multiple models are combined - mixing IaaS, PaaS, and/or SaaS into a hybrid.
S.a.a.S. - Software as a Service
When users access applications over the Internet that are provided by a third party. The applications need not be installed on the local computer. A common example of this is webmail.
