About ZXCTN6000 (V1.1) PW dual-homing, which of the following are correct?()
A.Currently, PW dual-homing supports two kinds of services: ETH service and E1 servic
B.PW dual-homing of ETH/E1 service supports PW1:1, PW1+1.
C.PW dual-homing of E1 service only supports PW1+1. ETH service supports PW1:1,PW1+1.
D.PW dual-homing of ETH service only supports PW1+1. E1 service supports PW1:1, PW1+1.