Which of the following is not a cloud characteristic?
Ubiquitous network access.
Single-tenancy is an architecture in which a single instance of a software application and supporting infrastructure serves one customer. Single-tenancy is commonly implemented in software-as-a-service (Saas) delivery models or in cloud services. In single-tenancy architectures, a customer -- called a tenant -- will have a singular instance of a SaaS application dedicated to them.
In a single-tenant architecture, the host provider will aid in managing the software instance and dedicated infrastructure while still lending nearly full control to a single tenant for customization of software and infrastructure. Some common characteristics of single-tenancy models are that they tend to provide a high level of user engagement and user control, as well as reliability, security and backup ability. Because tenants are in a separate environment from one another, they are not bound in the same way tenants using a shared infrastructure would be.
Potential customers would likely choose a single-tenant infrastructure over other possible options for the ability to have more control and flexibility in their environment for addressing specific requirements.