CompTIA A+ Core 1 (220-1201)Virtualization and Cloud ComputingMedium
A large enterprise is transitioning its legacy applications to a virtualized environment. The IT department wants to ensure that each virtual machine (VM) is isolated from other VMs on the same physical host to prevent security breaches and performance interference. What fundamental virtualization concept addresses this requirement?
- AVM isolation
- BResource pooling
- CLive migration
- DHardware abstraction
Show answer & explanationAnswer & explanation
Correct answer: A. VM isolation
VM isolation is a fundamental concept in virtualization where each virtual machine operates independently, with its own allocated resources and operating system, preventing processes or issues in one VM from affecting others on the same physical hardware. This is crucial for security and performance stability.
Why the other options are wrong
- B. Resource pooling is about aggregating physical resources for multiple VMs, not isolating them.
- C. Live migration is the process of moving a running VM between physical hosts without downtime.
- D. Hardware abstraction is the process of hiding the physical hardware details from the VMs, enabling portability.
VM Isolation
The principle in virtualization that ensures each virtual machine operates independently of others on the same physical host, preventing interference in terms of security, performance, and resource usage.
- Each VM has its own virtual hardware and OS.
- Prevents security breaches between VMs.
- Ensures performance stability for each VM.
Memory trick: Keep VMs 'ISOLATED' like separate islands for safety.