单项选择题
A.[Quidway] ip addresss erial0/0/1 equal loopback0
B.[Quidway-serial0/0/1] ip addresss erial0/0/1 equa lloopback0
C.[Quidway] ip address unnumbered interfaceserial0/0/1 loopback0
D.[Quidway-serial0/0/1] ip address unnumbered interface loopback0