| Term | Definition |
|---|---|
| DWDM | |
| Direct Dial Inbound | DDI allows users to rent individual phone numbers without the need to rent individual lines. A single phone line is allocated to a range of numbers saving the expense of having a separate phone line for each number. |
| Desktop-as-a-Service | Desktop as a Service (DaaS) is a cloud service in which the back-end of a virtual desktop infrastructure is hosted by a cloud service provider. DaaS has a multi-tenancy architecture and the service is purchased on a subscription basis. |
| Data Centre hosting | Data Centre hosting describes the hosting of Data Centres or databases on third party servers. Data Centre hosting is often done through colocation solutions and therefore avoids expensive on premise server and hardware purchases. |
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