1.8 Cloud Concepts and Connectivity Options

Question 1

Software as a Service (SaaS).

Answer 1

Software as a Service (SaaS) allows us to use an application provided and maintained by the service provider.

Question 2

Platform as a Service (PaaS).

Answer 2

Platform as a Service (PaaS) is a platform for designing applications that are compiled and executed in the cloud.

Question 3

Infrastructure as a Service (IaaS).

Answer 3

Infrastructure as a Service (IaaS) allows the customer to rent the infrastructure of compute, network, and storage from the cloud provider.

Question 4

Desktop as a Service (DaaS).

Answer 4

Desktop as a Service (DaaS) is a service that provides the end user with a virtual desktop that lives in the cloud.

Question 5

Private Cloud.

Answer 5

In a private cloud, resources are owned by the organization and exclusively used by the organization

Question 6

Public Cloud.

Answer 6

In a public cloud, defined resources at the provider are provisioned and used by the general public. The public cloud allows a pay-as-you-go strategy that is similar to renting the equipment rather than owning it.

Question 7

Hybrid Cloud.

Answer 7

A hybrid model is a blend of both the public cloud and private cloud within an organization.

Question 8

Community Cloud.

Answer 8

A community model is a grouping of organizations for a cloud resource that share a common access requirement.

Question 9

Public Cloud connectivity method.

Answer 9

When we host resources in the public cloud, we need local resources such as authentication.

Question 10

VPS’s and the Public Cloud.

Answer 10

Virtual private networks (VPNs) are used to allow an encrypted tunnel to be built across the public Internet. VPNs allow for the agility of change, such as switching data centers.

Question 11

WAN’s and the Public Cloud.

Answer 11

Public wide area networks (WANs) can be built out from the customer to the public cloud provider; these connections are exclusive for the customer.

Question 12

Infrastructure as Code (IaC).

Answer 12

Infrastructure as Code empowers DevOps to provision servers with code-based automation and orchestration tools.

Question 13

Infrastructure as Code (IaC) Imperative Approach.

Answer 13

An imperative approach requires a step-by-step script to be created for the end goal.

Question 14

Infrastructure as Code (IaC) Declarative Approach.

Answer 14

A declarative approach only defines the end state and it is left to the orchestration tool to get to the end goal.

Question 15

Three common tools for Infrastructure as Code (IaC).

Answer 15

Three common tools for IaC are Chef, Puppet, and Ansible.

Question 16

Multitenancy.

Answer 16

The characteristic of multitenancy means that more than one organization shares a piece of hardware or service.

Question 17

Elasticity.

Answer 17

Elasticity defines that resources can be added to a service or application during peak utilization and removed when the utilization is nominal.

Question 18

Scalability.

Answer 18

Scalability is a strategic scaling out of a service or application based upon demand.

Question 19

Security of Data Transmitted.

Answer 19

Data should be transmitted with encryptions to prevent eavesdropping of the data.

Question 20

Security of Data at Rest.

Answer 20

When data lands on the public cloud, it should be encrypted at rest on the disk.

Question 21

Single Sign-On (SSO).

Answer 21

In addition to encryption of data, we should consider identity management and maintaining a single sign-on (SSO) environment for our users.

Question 22

Cloud Bursting.

Answer 22

An example of using the public cloud for local compute resources is cloud bursting, when purchasing the equipment is too expensive or it will take too long to acquire.

Question 23

Storage Resources.

Answer 23

Storage resources can be used for month-end backups of our local server farm; this moves the backups away from our physical location in the event of disaster.