Which two installation models are supported by Cisco virtual interfaces? (Choose two)
A. pass-through switching
B. stare-and-forward switching
C. channeled uplink
D. hypervisor controlled
E. native switching
Which two installation models are supported by Cisco virtual interfaces?
“Cisco VM-FEX technology supports virtual machine interfaces run in two different modes:
• Emulated mode
• PCIe Pass-Through or VMDirectPath mode
Emulated Mode
The hypervisor emulates a NIC (sometimes called a back-end emulated device) to replicate the hardware it virtualizes for the guest virtual machine. The emulated device presents descriptors, for read and write, and interrupts to the guest virtual machine just as a real hardware NIC device would.
VMDirectPath or Pass-Through Mode
Virtual Interface Card uses PCIe standards-compliant IOMMU technology from Intel and VMware’s VMDriectPath technology to implement PCIe Pass-Through across the hypervisor layer and eliminate the associated I/O overhead (Figure 5). Pass-Through mode can be requested in the port profile associated with the interface using the “high-performance” attribute. ”
https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/ucs-m81kr-virtual-interface-card/white_paper_c11-618838.html