Which of the following are benefits of virtualization in a cloud environment? (Select two.)

An administrator is testing a new web server from outside of the corporate firewall. The administrator performs a test from a single PC and the web server responds accordingly. The administrator then provisions several virtual machines on a network behind NAT and uses them to perform the same operation on the web server at the same time, but thereafter soon discovers that none of the machines can reach the web server.
Which of the following could be responsible?

Worldwide users from an organization are experiencing intermittent access to a global cloud application.
The cloud provider availability dashboard shows all resource availability has been 100% in the last two weeks. No network outages have been reported. Which of the following should the organization's administrator do BEFORE calling the cloud provider?

In an IaaS environment, the security team issues a new signature file to prevent specific malware threats from infiltrating the company network. Which of the following describes where the security team should deploy the updated signatures?

An administrator for a non-profit organization has been tasked with creating a flexible cloud solution.
Which of the following would allow the programmer to customize this implementation?