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You have just configured the network interface on systemA . The following information is  From systemB， you test the network connectivity by sending ICMP ECHO_REQUEST packets to  systemA. The following message is displayed： no answer from systemA  What is most likely the problem？（）
A: The interface is not plumbed.
B: The interface is not configured.
C: The interface does not have valid routes configured.
D: The interface is not marked as

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出自：Oracle认证

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