What methods can be used to deliver the token code for two-factor authentication? (Choose three.)

Two-factor authentication (2FA) enhances security by requiring not only a password and username but also something that only the user has on them - a token. In this context, delivering the token code through various methods is essential for ensuring that the user can access the code securely and conveniently.

Using FortiToken is a prominent method for delivering token codes. FortiTokens are physical or virtual devices that generate one-time password (OTP) codes that users can enter during the authentication process. They can be integrated with Fortinet's security architecture and provide a reliable and secure means of generating and communicating authentication tokens.

In terms of the other provided methods, browser pop-up windows can be used for delivering codes but are less common and may have security risks, particularly if not properly implemented or if the user's machine is compromised. Email is also a valid option, yet it can be vulnerable to interception, making it less secure than dedicated authentication devices like FortiToken. Code books, while they can provide a form of 2FA by presenting a series of passcodes, are impractical in a modern, dynamic environment where tokens need to be frequently changed or updated.

Therefore, FortiToken stands out as the most secure and efficient method for delivering token codes in a