Exam SK0-005 topic 1 question 202 discussion

Option B, push notifications, would be the most cost-effective solution to implement MFA on all servers. With push notifications, the user receives a notification on their mobile device or computer prompting them to approve or deny access to the server. This method does not require any additional hardware or tokens and can be implemented easily. Option A, biometrics, may provide a high level of security, but it would require additional hardware such as fingerprint scanners or facial recognition cameras, which can be expensive. Option C, smart cards, require the purchase and distribution of smart cards to all users, which can be costly and time-consuming to manage. Option D, physical tokens, such as key fobs or USB tokens, are also costly to purchase and distribute to all users. Additionally, if a user loses their token, it may cause a delay in access to the server until a new token can be distributed.

agree with B

Option B, push notifications, is likely the most cost-effective technique for implementing MFA on servers. This option involves a user attempting to log in with their username and password, and then receiving a push notification on their mobile device asking them to confirm the login attempt. This provides an additional layer of authentication beyond just a username and password.