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单选题
A Network Engineer is reporting that one of the AIX hosts is generating too much ICMP traffic, which is slowing the network. Which of the following options is the most probable cause?（）
A
A large FTP job is in process.
B
A network interface was misconfigured.
C
The ping command is being used excessively.
D
A bad network interface card and/or network cable is in use.
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