What feature of vSphere helps in increasing availability and security of virtual infrastructure?

Decoupling from hardware is a fundamental feature of VMware vSphere that significantly enhances both the availability and security of virtual infrastructure. By abstracting the operating system and applications from the underlying physical hardware, vSphere enables virtual machines (VMs) to operate independently of specific hardware configurations. This allows for greater flexibility in managing resources and helps ensure that VMs can be migrated seamlessly between physical hosts in response to hardware failures or maintenance needs, thereby increasing availability.

In terms of security, this decoupling supports robust disaster recovery strategies, as VMs can be quickly restored or moved to different hardware without extensive reconfiguration. Additionally, it allows for improved isolation of workloads, which can help mitigate the risk of vulnerabilities affecting multiple VMs on the same physical host.

The other options do not directly contribute to enhancing the overall availability and security of the infrastructure in the same manner as decoupling from hardware does. The use of multiple hypervisors can lead to additional complexity and may not provide the same level of cohesive management and security as a single, unified hypervisor. Static resource allocation can improve performance for specific workloads but does not inherently increase availability or security. Limited access to management software is a security measure but does not have the same broad impact on overall infrastructure availability