单选题Which of the following should you enable to prevent a switch from forwarding packets with source addresses that are outside an administratively defined group？ （）A DAIB STPC PVLAND port security
单选题
Which of the following should you enable to prevent a switch from forwarding packets with source addresses that are outside an administratively defined group？ （）
A
DAI
B
STP
C
PVLAN
D
port security
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解析：
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