Virtualization represents a sea change in IT practices. IT infrastructure was over capacity, underused and not cost-effective. With the advent of virtualization, many of these problems disappeared. Because multiple virtual machines can be placed on a single server, IT organizations can ensure that the machine’s processing power is portioned out to many applications. But security groups are unsure how to apply practices designed for a physical environment to a virtualized one. Security organizations monitor network traffic to identify and block malicious traffic and penetration attempts.”]
Source: https://www.csoonline.com/article/2131147/3-key-issues-for-secure-virtualization.html