HCIA-Security V4.0 Exam
Last Update Feb 25, 2026
Total Questions : 91
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At what layer does packet filtering technology in the firewall filter packets?
DES is a stream encryption algorithm, because the cipher capacity is only 56 bits, so it is not enough to deal with the weakness of insufficient security, and later 3DES was proposed.
Which of the following characteristics does a denial-of-service attack include?
As shown in the figure, what is the range of the AH protocol authentication range in transmission mode?
TESTED 25 Feb 2026
