Which two services define cloud networks? (Choose two.)

A.
Infrastructure as a Service

B.
Platform as a Service

C.
Security as a Service

D.
Compute as a Service

E.
Tenancy as a Service

Explanation:
BD
The NIST’s definition of cloud computing defines the service models as follows:[2]
+ Software as a Service (SaaS). The capability provided to the consumer is to use the provider’s applications
running on a cloud infrastructure. The applications are accessible from various client devices through either a
thin client interface, such as a web browser (e.g., web-based email), or a program interface. The consumer
does not manage or control the underlying cloud infrastructure including network, servers, operating systems,
storage, or even individual application capabilities, with the possible exception of limited user-specific
application configuration settings.
+ Platform as a Service (PaaS). The capability provided to the consumer is to deploy onto the cloud
infrastructure consumer-created or acquired applications created using programming languages, libraries,
services, and tools supported by the provider. The consumer does not manage or control the underlying cloud
infrastructure including network, servers, operating systems, or storage, but has control over the deployed
applications and possibly configuration settings for the application-hosting environment.
+ Infrastructure as a Service (IaaS). The capability provided to the consumer is to provision processing,
storage, networks, and other fundamental computing resources where the consumer is able to deploy and run
arbitrary software, which can include operating systems and applications. The consumer does not manage or
control the underlying cloud infrastructure but has control over operating systems, storage, and deployed
applications; and possibly limited control of select networking components (e.g., host firewalls).
Source: https://en.wikipedia.org/wiki/Cloud_computing#Service_models