Page 853 - Cloud computing: From paradigm to operation
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Intercloud and interoperability                                     5


            3.1.5   cloud service level objective [b-ISO/IEC 19086-1]: Commitment a cloud service provider makes for
            a specific, quantitative characteristic of a cloud service, where the value follows the interval scale or ratio
            scale.
            NOTE – An SLO commitment may be expressed as a range.
            3.1.6   cloud service provider [b-ITU-T Y.3500]: Party which makes cloud services available.

            3.1.7   cloud  service  qualitative  objective  [b-ISO/IEC  19086-1]:  Commitment  a  cloud  service  provider
            makes for a specific, qualitative characteristic of a cloud service, where the value follows the nominal scale
            or ordinal scale.
            NOTE 1 – A cloud service qualitative objective may be expressed as an enumerated list.
            NOTE 2 – Qualitative characteristics typically require human interpretation.
            NOTE 3 – The ordinal scale allows for existence/non-existence.

            3.1.8   inter-cloud computing [ITU-T Y.3511]: The paradigm for enabling the interworking between two or
            more cloud service providers.

            3.1.9   service  level  agreement  (SLA)  [b-ITU-T  Y.3500]:  Documented  agreement  between  the  service
            provider and customer that identifies services and service targets.
            NOTE 1 – A service level agreement can also be established between the service provider and a supplier, an internal
            group or a customer acting as a supplier.
            NOTE 2 – A service level agreement can be included in a contract or another type of documented agreement.

            3.2     Terms defined in this Recommendation
            None.


            4       Abbreviations and acronyms

            This Recommendation uses the following abbreviations and acronyms:
            BSS       Business Support System

            CSA       Cloud Service Agreement
            CSC       Cloud Service Customer
            CSP       Cloud Service Provider

            DoS       Denial-of-Service
            E2E       End-to-End

            IaaS      Infrastructure as a Service
            NaaS      Network as a Service

            OSS       Operations Support System
            SaaS      Software as a Service

            SDN       Software Defined Network
            SLA       Service Level Agreement
            SLO       cloud Service Level Objective

            SQO       cloud Service Qualitative Objective
            SSO       Single Sign-On

            TLS       Transport Layer Security
            VM        Virtual Machine




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