Which term best describes the sharing of CPU, memory, and I/O resources among virtual machines on a single host?

• A. Resource Pooling
• B. Data Replication
• C. Network Segmentation
• D. Storage Tiering

Answer: (A)

Resource pooling describes sharing CPU, memory, and I/O resources among virtual machines on a single host. In virtualization, the hypervisor gathers the physical resources into pools and dynamically allocates portions of those pools to each VM as needed. This setup allows efficient use of hardware, enables balancing of resources among VMs, and supports policies like reservations (guaranteed minimums), limits, and shares (relative priorities) to control how resources are distributed under demand. Data replication is about duplicating data for redundancy, network segmentation is about isolating network traffic, and storage tiering moves data between different storage types for performance or cost reasons—none of these capture the idea of distributing compute and I/O resources across multiple VMs on one host.