What type of hypervisor can be used without any associated licensing costs?

The correct answer is open source hypervisors, which typically have no associated licensing costs. Open source hypervisors are designed to be freely available to the public, allowing users to download, modify, and use them without the burden of licensing fees. This makes them an attractive option for organizations looking to minimize costs while still leveraging virtualization technology.

Open source hypervisors often have a community of developers who contribute to their ongoing maintenance and improvement, which can also lead to rapid advancements and support for modern virtualization features. Therefore, they are especially popular among those who prioritize flexibility and cost-effectiveness in their cloud infrastructure setup.

Proprietary hypervisors, on the other hand, usually require the purchase of licenses which can become costly depending on the scale of deployment. Type 1 and Type 2 hypervisors refer to the architecture of the hypervisors (bare-metal versus hosted, respectively) rather than their licensing model, so they do not necessarily relate to whether or not there are associated licensing costs.