Which three protocols can be used to back up a UCS system?（）

A.By using active / passive teaming with spanning tree on the active Iink
B.By using active / passive teaming with onIy the active Iink in use
C.By using active / activate teaming with VM utilizing both uplink ports

A.increases the number of VSANS without limit
B.reduces power consumption per rack
C.cuts the number of network cards and cables
D.simplifies the management of SAN domains