What is a valid setup for a Virtual Switching Framework (VSF) fabric?
A. one 5406R zl2 switch as commander and one 5412R zl2 switch as a standby member
B. one 5412R zl2 switch as commander and two 5406R zl2 switches as standby members
C. one 5406R zl2 switch as commander and two 5412R zl2 switches as standby members
D. one 5412R zl2 switch as commander and one 5412R zl2 switch as a standby member
D