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单选题
Which switch should be used with the ipconfig command if an administrator wants to test the functionality of a DHCP server?（）
A
/renew
B
/flushdns
C
/release
D
/all
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单选题The Company security administrator wants to prevent DHCP spoofing. Which statement is true about DHCP spoofing operation？（）A
DHCP spoofing and SPAN cannot be used on the same port of a switch.B
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