Which of the following are three accurate statements that describe Symmetrix GigE Channel Directors? (Choose three)

A.
The GigE Director network bandwidth usage can be throttled downward.

B.
Outboard compression hardware is always required.

C.
Compression can be turned off.

D.
The GigE SRDF data flow uses two round trips per transfer operation.

E.
Prior to DMX, the GigE Director did not perform data compression.