What is Aruba's recommended best option for authenticating guest users?

The correct option for authenticating guest users is the Captive Portal. This method provides a user-friendly interface for guests to access the network, typically by redirecting them to a web page upon connection. Through this page, they can agree to terms of service, provide necessary information, or enter credentials before being granted network access.

Captive portals are particularly effective in environments where guests need to connect quickly and easily, as they streamline the process by presenting a clear and simple interface. This approach is advantageous because it allows for customization of the login experience, including branding and other information, and it can also provide information about usage policies. Additionally, Captive Portals can incorporate various authentication methods, such as social media logins or temporary access accounts, enhancing security and management of guest access.

Other options, such as MAC Authentication and RADIUS Authentication, are generally more suitable for authenticated users who need to access secure environments rather than transient guests. Meanwhile, a Guest Portal is a broader term that could include various methods of enabling guest access but lacks the specific function and user experience designed for ease of access that a Captive Portal provides.