单选题Which method is of gaining access to a system that bypasses normal security measures？（）AStarting a Smurf attackBConducting social engineeringCCreating a back doorDLaunching a DoS attack
单选题
Which method is of gaining access to a system that bypasses normal security measures？（）
A
Starting a Smurf attack
B
Conducting social engineering
C
Creating a back door
D
Launching a DoS attack
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