Page 31 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

3 Definitions

3.1 Terms defined elsewhere

This Recommendation uses the following terms defined elsewhere:
3.1.1 big data [ITU-T Y.3600]: A paradigm for enabling the collection, storage, management, analysis and
visualization, potentially under real-time constraints, of extensive datasets with heterogeneous
characteristics.
NOTE – Examples of datasets characteristics include high-volume, high-velocity, high-variety, etc.
3.1.2 big data as a service (BDaaS) [ITU-T Y.3600]: A cloud service category in which the capabilities
provided to the cloud service customer are the ability to collect, store, analyse, visualize and manage data
using big data.
3.1.3 cloud computing [ITU-T Y.3500]: Paradigm for enabling network access to a scalable and elastic pool
of shareable physical or virtual resources with self-service provisioning and administration on-demand.
NOTE – Examples of resources include servers, operating systems, networks, software, applications, and storage
equipment.

3.1.4 cloud service [ITU-T Y.3500]: One or more capabilities offered via cloud computing invoked using a
defined interface.

3.1.5 cloud service category [ITU-T Y.3500]: Group of cloud services that possess some common set of
qualities.

3.1.6 cloud service customer [ITU-T Y.3500]: Party which is in a business relationship for the purpose of
using cloud services.
NOTE – A business relationship does not necessarily imply financial agreements.
3.1.7 cloud service partner [ITU-T Y.3500]: Party which is engaged in support of, or auxiliary to, activities
of either the cloud service provider or the cloud service customer, or both.
3.1.8 cloud service provider [ITU-T Y.3500]: Party which makes cloud services available.

3.1.9 cloud service user [ITU-T Y.3500]: Natural person, or entity acting on their behalf, associated with a
cloud service customer that uses cloud services.

NOTE – Examples of such entities include devices and applications.
3.1.10 communications as a service (CaaS) [ITU-T Y.3500]: Cloud service category in which the capability
provided to the cloud service customer is real time interaction and collaboration.

NOTE – CaaS can provide both application capabilities type and platform capabilities type.
3.1.11 desktop as a service (DaaS) [ITU-T Y.3503]: A cloud service category in which the capabilities
provided to the cloud service customer are the ability to build, configure, manage, store, execute and deliver
users' desktop functions remotely.

3.1.12 hypervisor [ITU-T Y.3510]: A type of system software that allows multiple operating systems to
share a single hardware host.

NOTE – Each operating system appears to have the host's processor, memory and other resources, all to itself.
3.1.13 infrastructure as a service (IaaS) [ITU-T Y.3500]: Cloud service category in which the cloud
capabilities type provided to the cloud service customer is an infrastructure capabilities type.
NOTE – The cloud service customer does not manage or control the underlying physical and virtual resources, but does
have control over operating systems, storage, and deployed applications that use the physical and virtual resources.
The cloud service customer may also have limited ability to control certain networking components (e.g., host firewalls).
3.1.14 infrastructure capabilities type [ITU-T Y.3500]: Cloud capabilities type in which the cloud service
customer can provision and use processing, storage or networking resources.

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