Multiple organizations operating in the same vertical want to provide seamless wireless access for their employees as they visit the other organizations. Which of the following should be implemented…

Shibboleth is an open-source project that uses SAML for web-based single sign-on (SSO) and identity federation, not for native 802.1x wireless authentication.

RADIUS federation enables independent RADIUS servers, typically managed by different organizations, to securely forward authentication requests to each other's home servers. This allows an employee from one organization to authenticate against their own identity provider when connecting to another organization's 802.1x-protected wireless network, ensuring seamless access without creating duplicate accounts or complex manual configurations.

SAML (Security Assertion Markup Language) is an XML-based standard primarily used for exchanging authentication and authorization data between an identity provider and a service provider in web-based scenarios, not for 802.1x.

OAuth (Open Authorization) is an authorization framework for granting access delegation, commonly used for web and API access without sharing user credentials, and is not an authentication protocol for 802.1x.

OpenID Connect is an identity layer built on top of the OAuth 2.0 protocol, primarily used for user authentication in web and mobile applications, not for 802.1x network access.