In managed hosting, service providers lease dedicated servers and the requisite hardware, such as dedicated servers, network hardware, system software and operating systems and manage those systems on behalf of the customer. The customers are referred to as tenants, and in this scenario, the leased equipment is dedicated to only a single customer, known as single-tenancy architecture.
Although the customer typically holds administrative access to their leased hardware and systems, they seldom use that access, preferring instead to interface with their systems via a web-based interface.
A DCaaS supplier provides offsite physical data center facilities and infrastructure as a service to their customers by renting or leasing access to their data center, use of their servers, networking, storage and additional computing resources. A DCaaS provider may also offer data management tools for problem/incident management and/or server and security optimization and utilization.
The typical business that would leverage a DCaaS provider is one that is no longer able to expand its own data center or a company that is unable to establish or maintain its own data center in its entirety; some reasons this may be the case include lack of capital, bandwidth, experienced IT staff, power, or any variety of other reasons.
Infrastructure as a service (IaaS) is one of the three main components of cloud computing services (the other two being software as a service (SaaS) and platform as a service (PaaS). In an IaaS model, a cloud provider hosts the infrastructure components that conventionally exist in an on-premises data center, including networking and storage hardware, servers and even the virtualization/hypervisor layer—a virtual machine monitor (VMM) that enables various virtual operating systems to run concurrently on a computer system.
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