Exam CV0-003 topic 1 question 112 discussion

The single root I/O virtualization (SR-IOV) interface is an extension to the PCI Express (PCIe) specification. SR-IOV allows a device, such as a network adapter, to separate access to its resources among various PCIe hardware functions.

To satisfy the requirements of low-latency, near-native performance of a physical NIC, and data protection between the VMs for a solution with multiple network I/O-intensive VMs, the BEST option would be: A. SR-IOV (Single Root I/O Virtualization).

Single Root Input/Output Virtualization Server motherboards include the PCIe bus, and one common component on the bus is a network interface card (or more than one). With traditional virtualization, the hypervisor controlled access between VMs and the bus. This control added a layer of complexity and latency to the structure. The PCIe bus has been extended to address this concern. The single root input/output virtualization (SR-IOV) functionality permits direct access between the VM and the PCIe bus and, by extension, the NICs on the bus. This permits much faster communication between the physical network connection and the VMs on the host server. The SR-IOV is particularly attractive to private cloud administrators that may be trying to gain as much efficiency as possible with the hardware deployments in their private data centers.