单选题The ping loopback hangs with no output.Which of the following is the most likely cause?（）AThe loopback interface is down and resolv.conf is configured.BThe loopback is not in /etc/hosts and resolv.conf is configured.CThe loopback interface is down and resolv.conf is not configured.DThe loopback is not in /etc/hosts and resolv.conf is not configured.
单选题
The ping loopback hangs with no output.Which of the following is the most likely cause?（）
A
The loopback interface is down and resolv.conf is configured.
B
The loopback is not in /etc/hosts and resolv.conf is configured.
C
The loopback interface is down and resolv.conf is not configured.
D
The loopback is not in /etc/hosts and resolv.conf is not configured.
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