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Considering a VMware vSphere 5 upgrade
Upgrading to ESXi 5: VMware’s latest hypervisor architecture
ESX and ESXi security features and best practices
VMware virtualization techniques for small IT budgets
Know your uptime: Differences between VMware FT and HA
Identity authentication features fortify virtual network security
Must-know vSphere 5.1 features for VMware admins
Applying vSphere network and vSwitch settings for a secure data center
Comparing the VMware vMA and other ESXi management tools
Extreme makeover: VMware end-user computing edition