What is a key benefit of the public cloud deployment model?

The public cloud deployment model offers a key benefit of no wasted resources. This is primarily due to its pay-as-you-go pricing structure, which allows organizations to only pay for the resources they actually use. Since resources in a public cloud environment can be dynamically allocated and scaled up or down based on demand, businesses can avoid the cost of maintaining excess capacity that might go unused.

In a public cloud environment, resources such as computing power, storage, and networking are shared among multiple users, which leads to more efficient utilization of these resources overall. This shared nature allows for significant cost savings and operational efficiencies, as organizations can leverage the infrastructure of cloud service providers without the need to invest heavily in their own physical hardware.

The other options indicate disadvantages or challenges that are not representative of the primary benefits provided by the public cloud model. For instance, high costs for service access can be misleading in the context of the public cloud's pricing model, as it is typically designed to reduce costs. Similarly, the complexities of setup and limited scalability are not inherent to public cloud environments; instead, they are characteristics more often associated with private or on-premises solutions.