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The most common systems security method is

A. passwords

B. encryption

C. firewall

D. all of the above

E. None of the above

Answer: Option A

Solution(By Examveda Team)

The most common systems security method is passwords.
Password : A password is a string of characters used for authenticating a user on a computer system. Most passwords are comprised of several characters, which can typically include letters, numbers, and most symbols, but not spaces.

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