Which major challenges of I/O virtualization do Virtual Machine Managers need to address?
(Select two)

A.
WWN virtualization

B.
DMA virtualization

C.
IRQ virtualization

D.
port virtualization

E.
MAC virtualization

Explanation:
Industry Standard Architecture – Student Guide 1 – Page 186:
Server-edge I/O virtualization
In server-edge I/O virtualization an abstraction layer is created between a pool of blade servers
and the external LAN and SAN networks to which they are connected.
This technoloy enabled infrastructure can then present the network with a constant set of media
access control (MAC) addresses and World Wide Names (WWNs) for each server bay in an
enclosure.