a) AAA (Accounting, Authentication, Authorisation) is a framework for configuring three independent security functions consistently. Which...

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a) AAA (Accounting, Authentication, Authorisation) is a framework for configuring three independent security functions consistently. Which one of the "3As" is each of these most closely related to? Why? [1] Intrusion detection system [2] Packet filter [3] Username + password b) Alice is thinking of making all users change their password every month. Why would she think this is a good idea? Bob is trying to convince her not to do this. What are his arguments against this policy? wwwwwww c) Bob wants to protect a plaintext file of user information (like Dovecot's /home/vmail/mail-pwd). Alice suggests this can be done with a special owner and particular permissions on the file and the directory where it is stored. How would this be done? How does each of these measures help restrict access? a) AAA (Accounting, Authentication, Authorisation) is a framework for configuring three independent security functions consistently. Which one of the "3As" is each of these most closely related to? Why? [1] Intrusion detection system [2] Packet filter [3] Username + password b) Alice is thinking of making all users change their password every month. Why would she think this is a good idea? Bob is trying to convince her not to do this. What are his arguments against this policy? wwwwwww c) Bob wants to protect a plaintext file of user information (like Dovecot's /home/vmail/mail-pwd). Alice suggests this can be done with a special owner and particular permissions on the file and the directory where it is stored. How would this be done? How does each of these measures help restrict access?