Which of the following terms describes a service model in cloud computing?

The term that describes a service model in cloud computing is Infrastructure as a Service (IaaS). IaaS is one of the three main service models in cloud computing, alongside Platform as a Service (PaaS) and Software as a Service (SaaS). With IaaS, cloud providers offer virtualized computing resources over the internet. This means that users can rent computing infrastructure, such as servers, storage, and networking, on a pay-as-you-go basis. This allows organizations to scale resources up or down as needed without the expenses and management associated with physical hardware.

The other terms mentioned do not fit as service models in cloud computing. For instance, Enterprise Resource Planning (ERP) refers to integrated management of core business processes through software and is not a level of service in cloud computing. Similarly, a Content Delivery Network (CDN) is a system for delivering web content to users based on their geographic location but does not describe a service model in the cloud. Lastly, a Local Area Network (LAN) refers to a network that connects computers and devices in a limited geographical area, which is unrelated to cloud service models.