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CCNA Practice Test
Routing and Switching
Security
Data Center
Service Provider
Voice
Wireless
CCNA Security Practice Test
Question 1 of 3
Which option is true of using cryptographic hashes?
A
They are easily reversed to decipher the message context.
B
They are based on a two-way mathematical function.
C
They are used for encrypting bulk data communications.
D
They convert arbitrary data into a fixed-length digest.
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