EXERCISE Multiplee seen as another way to reduce the attack surface area? A. Dedicated service accounts. B. PKI C. Two-factor authentication. D. Strong authentication. E. Access control. tion is vulnerable as it flows across the network, unlessi is A. log analyzed. B. clear texted. C. basically authenticated. D. encrypted. E. All of the above 3. The Unix group mechanism allows for a single user to belong to one or more A. attributes. B. ACLs. C. permissions. D, permissions and ACLa,its . Even after hardening a Unix system with restrictive user important to maintain logs of A. audit trails. B. system messages. system activity D. bash. the history lags kept by E. All of the above.audit tra 5. An additional source a login shell such as: A. lo hasof audit trail data about system actvity s y t s B. file. C. password. D. bash. E. All of the above