Final answer:
The easiest and most immediate measure to enhance network security for office-level users with administrative privileges is implementing a strong password policy.
Therefore, the correct answer is: option d). Strong password policy
Step-by-step explanation:
Implementing a strong password policy involves establishing rules that users must follow when creating their passwords, which often includes requirements for a minimum password length, the use of both upper and lowercase letters, numbers, and special characters.
This is often the quickest to enforce because it does not require additional hardware or extensive training for the users.
While two-factor authentication (2FA) also significantly increases security, setting up 2FA can be slightly more complex as it requires configuring an additional verification step, which could involve SMS texts, authenticator apps, or physical tokens.
Role-based access control is more about organizing user permissions rather than quickly implementing a security measure. An intrusion detection system (IDS) requires substantial setup and is more about ongoing monitoring rather than an immediate security enhancement.