Fotis recently accepted a new position as a security professional at a company that runs its entire IT infrastructure within an IaaS environment. Which one of the following would most likely be the responsibility of Fotis's firm?

In an infrastructure-as-a-service environment, the vendor is responsible for hardware- and network-related responsibilities. These include configuring network firewalls, maintaining the hypervisor, and managing physical equipment. The customer retains responsibility for patching operating systems on its virtual machine instances.