A network firewall has been configured with the latest vendor security patches.

 Firewall Hardening:

Requirement 1.2 mandates that firewalls should be configured with only the necessary functionality to reduce attack surfaces. Disabling unused functions eliminates potential vulnerabilities​.

 Explanation of Other Options:

A:Shared accounts violate Requirement 8.1.5, which prohibits shared or generic accounts.

B:Allowing all traffic initially violates Requirement 1.2.1, which requires a restrictive firewall policy.

C:Synchronization of rules may not always be necessary, especially for firewalls with different scopes or roles.