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layout: default
title: CAS - Protocol Overview
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# Protocols

The following protocols are supported and provided by CAS:

*   [CAS](CAS-Protocol.html)
*   [OpenID](OpenID-Protocol.html)
*   [OAuth](OAuth-Protocol.html)
*   [OpenID Connect](OIDC-Protocol.html)
*   [WS Federation](WS-Federation-Protocol.html)
*   [SAML1](SAML-Protocol.html)
*   [SAML2](../installation/Configuring-SAML2-Authentication.html)
*   [REST Protocol](protocol/REST-Protocol.html)
