Which of the following are used by IAM service to authenticate a principal? (Choose three)

In the context of Oracle's Identity and Access Management (IAM) service, multiple methods are employed to authenticate a principal, such as users or applications. Among the listed options, username/password is a foundational and widely used authentication method. This method validates the identity of a principal by requiring them to provide their unique username and corresponding password, ensuring that access is restricted to authorized users only.

Other methods of authentication include wallet credentials and authentication tokens, which can also play a significant role in secure access management. Wallet credentials provide a mechanism to securely store and access sensitive information, while authentication tokens such as OAuth tokens enable secure communication between services by proving the identity of the user without repeatedly transmitting the username/password, enhancing security and efficiency.

SSH is not typically a method of authentication used by IAM in the same context as username/password, wallet credentials, or authentication tokens. Instead, SSH (Secure Shell) is often used for secure remote login to systems but does not directly relate to IAM's authentication principles for service-level access.

Understanding the range of authentication methods helps in comprehending how IAM provides secure and seamless access management for cloud resources.