PRELIM NET TECH - H1

Cloud computing

It is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources.

Cloud

It is a metaphor for networks and the Internet, and refers to an abstraction of the

Internet and the infrastructure that underpins it.

Computing

It refers to computing services provided by a powerful computer with a range of functionalities, resources, and storage.

E-Gov Cloud Online Services

This cloud enables access to comprehensive public services through the Internet and serves as an extensive service platform with software, application, and information resources provisioned for governmental bodies.

Public Cloud

It is the main form of cloud computing, which is developing considerably in China.

Private cloud

It is a cloud infrastructure operated solely for a single organization. All data of the

private cloud is kept within the organization's data center.

Public cloud service provider

owns and operates the cloud infrastructure and provides cloud

services open to the public or enterprise customers.

Hybrid cloud

It is a combination of a public cloud and a private cloud or on-premises resources, that remain distinct entities but are bound together, offering the benefits of multiple deployment models.

Infrastructure as a Service (IaaS)

• The cloud platform provides infrastructure (such as servers, storage devices, networks, and virtual resources) and maintains related resources.

• Users only need to pay attention to the system and application layers.

Platform as a Service (PaaS)

• The cloud platform provides infrastructure (such as servers, storage devices, networks, and virtual resources) and application deployment environment (such as the operating system, middleware, and software running environment) and maintains related resources.

• Users only need to focus on applications and data.

Software as a Service (SaaS)

• The cloud platform provides all resources, services, and maintenance.

• Users only need to use applications.

On-demand self-service (Benefits of Cloud Computing)

Customers can deploy processing services based on actual requirements on the server running time, network, and storage, and do not need to communicate with each service provider.

Broad network access (Benefits of Cloud Computing)

Various capabilities can be obtained over the Internet, and the Internet can be accessed in standard mode from various clients, such as mobile phones, laptops, and PADs.

Resource pooling (Benefits of Cloud Computing)

Computing resources of the service provider are centralized so that customers can rent services. In addition, different physical and virtual resources can be dynamically allocated and reallocated based on customer requirements.

Quick deployment and auto scaling (Benefits of Cloud Computing)

Cloud computing can rapidly and elastically provide computing capabilities. A customer can rent unlimited resources and purchase required resources at any time.

Metered services (Benefits of Cloud Computing)

Cloud services are billed based on the actual resource usage, such as the CPU,

memory, storage capacity, and bandwidth consumption of cloud servers.

Massive scale (Common Characteristics of Cloud Computing)

Cloud computing service is on a large scale as it centralizes IT resource supply. This makes cloud computing different from conventional IT.

Homogeneity (Common Characteristics of Cloud Computing)

It can also be understood as standardization, which is similar to power utilization.

Virtualization (Common Characteristics of Cloud Computing)

It has two meanings. One is accurate computing units. The other meaning is the separation of software and hardware.

Elastic computing (Common Characteristics of Cloud Computing)

It means that IT resources can be elastically provided.

Low-cost software (Common Characteristics of Cloud Computing)

It is provided to meet the market competition and requirements.

Geographic distribution (Common Characteristics of Cloud Computing)

IT services can be provided anytime and anywhere.

Service orientation (Common Characteristics of Cloud Computing)

Cloud computing is a service model, and the overall design is service-oriented.

Advanced security technology (Common Characteristics of Cloud Computing)

Public cloud has a large number of users with different requirements. Therefore, this must be adopted to protect cloud computing.