Answer A,C is correct: A. It is owned and maintained by one party, but it is shared among multiple organizations.; C. It provides services that are accessed over the Internet.. A public cloud is operated by a third-party provider and its services are delivered over a network, commonly the Internet, to many customers. The platform is shared, but tenants are logically isolated from one another. That is different from a private cloud, where the infrastructure is dedicated to one organization, and different from a hybrid model, which combines private resources with public-cloud services. Cisco CCNA 200-301 v1.1 Network Fundamentals includes cloud models so candidates can separate public, private, hybrid, SaaS, PaaS, and IaaS concepts. The wording ' owned and maintained by one party, but shared among multiple organizations ' matches a public provider model. The wording ' services accessed over the Internet ' is also a defining public-cloud characteristic. Full customization of the underlying resources points more toward private cloud or dedicated infrastructure, so it is not one of the best answers here.