Answer:Software as a Service (SaaS)
Explanation: Software as a service(SaaS) is the software model that consist of the services don by it in the distributed form. There is presence of the third party or external factor that helps in providing the internet with the users It is the widely used in the area of cloud computing.
Kaira's company is also tending to used the software as service model(SaaS) for their company to maintain the connection of the system's host and employees.