单选题A System p administrator must change the 9.47.53.0 subnet from 128 addresses to 64 addresses. How can the AIX systems in the network be permanently modified to accomplish this（）Amktcpip -h hostname -a 9.47.53.x -m 255.255.255.64 -i en0 -g 9.3.230.1Bifconfig en0 netmask 255.255.255.64Cchdev -l en0 -a netmask=255.255.255.192Difconfig en0 netmask 0xffffffc0
单选题
A System p administrator must change the 9.47.53.0 subnet from 128 addresses to 64 addresses. How can the AIX systems in the network be permanently modified to accomplish this（）
A
mktcpip -h hostname -a 9.47.53.x -m 255.255.255.64 -i en0 -g 9.3.230.1
B
ifconfig en0 netmask 255.255.255.64
C
chdev -l en0 -a netmask=255.255.255.192
D
ifconfig en0 netmask 0xffffffc0
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