What is the best way to prevent a VLAN hopping attack?
A.
Encapsulate trunk ports with IEEE 802.1Q.
B.
Physically secure data closets.
C.
Disable DTP negotiations.
D.
Enable BDPU guard.
Explanation:
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C.
Disable DTP negotiations.
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DTP is the devil.
in cisco’s language….even saying DTP is like reading aloud from the Necronomicon in a church at midnight wearing black robes and lighting candles full of pigs blood…..you just don’t do that.
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