As enterprises move toward virtualizing more of their servers and data center infrastructure, the security technologies that are plentiful and common-place in the physical world become few and far between. In this review for Network World this week, I look at five common VM security tools that offer a range of protective features. Included in the review are:

• BeyondTrust PowerBroker Servers for Virtualization
• Catbird Networks vSecurity
• HyTrust Appliance
• Reflex Systems Virtualization Management Center
• Third Brigade/Trend Micro Deep Security