Which of the following commands will set the duplex of a network adapter?()
A、no -a media_speed=100_Full_Duplex en0
B、ifconfig -a media_speed=100_Full_Duplex ent0
C、chdev -l ent0 -a media_speed=100_Full_Duplex
D、chinet -l en0 -a media_speed=100_Full_Duplex en0