A company needs to create a test environment virtually using $32$ servers, $20$

clients $($including simulated mobile phones and tablets$),3$ routers, and $3$

switches. They plan to update them with all the latest security patches and test

the outcomes to see if any of the updates cause issues with their latest software

release. Which of the following services best describes what they need to use?

A

Platform as a service

Infrastructure as Code

Software as a Service

D

Security as a service

E

Storage as a Service