SAML and RADIUS

Definitely SAML and RADIUS (SAML because of just-in-time, and RADIUS because of AAA)

A. Kerberos and TACACS: [INCORRECT] Kerberos for on-premises auth within a domain but doesn't directly support integration with SaaS . TACACS doesn't support SaaS applications or risk-based policies based on location. B. SAML and RADIUS: [INCORRECT] SAML supports SSO, integrating with SaaS applications and applying risk-based policies based on location. RADIUS is used for NAC but doesn't directly support integration with SaaS applications. SAML aligns with the objectives, but RADIUS doesn't . C. OAuth and OpenID: [CORRECT] OAuth can grant access to resources, including SaaS applications, and can be used for MFA. OpenID provides SSO and user authentication, supports risk-based policies and just-in-time provisioning. D. OTP and 802.1X: [INCORRECT] OTP supports MFA, but is not ideal for integrating with SaaS applications or just-in-time provisioning. 802.1X is used for network access control and doesn't directly support the objectives.

Oauth and OpenID

C. OAuth and OpenID OAuth (Open Authorization) and OpenID are modern, open-standard protocols that provide secure delegated access. They’re widely used for single sign-on (SSO) and identity federation. OAuth is a protocol that allows an application to authenticate against a server as a user, without requiring passwords or tokens to be passed to the application itself. This is particularly useful for SaaS applications. OpenID Connect (an extension of OAuth) is a protocol that allows clients to verify the identity of an end-user based on the authentication performed by an authorization server. Both OAuth and OpenID support just-in-time provisioning, which is the ability to create a user account within an application at the time of authentication2.

C. OAuth and OpenID Explanation: OAuth (Open Authorization) is commonly used for authorization and delegated access. It is suitable for scenarios where a user wants to grant a third-party application limited access to their resources without sharing their credentials. OAuth is often used in conjunction with OpenID Connect (OIDC) for authentication. OpenID Connect (OIDC) is an identity layer built on top of OAuth 2.0. It provides an authentication layer, allowing clients to verify the identity of end-users based on the authentication performed by an authorization server.

To support the specified objectives, the organization should implement the following authentication protocols: C. OAuth and OpenID Explanation: OAuth: OAuth is commonly used for delegated authorization and is suitable for integrating with SaaS applications. It allows secure access to resources without sharing the user's credentials. OpenID: OpenID is an authentication protocol that enables single sign-on (SSO) and is often used in conjunction with OAuth for user authentication. It is useful for improving the user experience by providing seamless access to multiple applications. This combination of OAuth and OpenID can help achieve multi-factor authentication (MFA), integrate with SaaS applications, and enhance the overall user experience.

The organization's objectives involve supporting multi-factor authentication (MFA), integrating with SaaS applications, applying risk-based policies, and performing just-in-time provisioning. The most suitable authentication protocols for these requirements are: C. OAuth and OpenID Explanation: OAuth (Open Authorization): OAuth is commonly used for authorization and enables secure API authorization flows, making it suitable for integrating with SaaS applications. It allows users to grant third-party applications limited access to their resources without sharing their credentials. OpenID: OpenID is an authentication protocol built on top of OAuth. It allows users to authenticate on one website and share their identity securely with other websites without the need to expose credentials. OpenID is beneficial for improving the user experience by enabling single sign-on (SSO) and supporting just-in-time provisioning.

OAuth and OpenID

You could make arguments for B, however C will be the correct answer on the test. The phrase "Identity and Access Management" aka IAM, is generally associated with OAuth, OIDC and SAML - but not RADIUS. Additionally, the requirement of SaaS integration would take RADIUS off of the table completely.

While B is a valid answer, the MOST correct answer is C. According to ChatGPT, OAuth/OpenID is considered a more versatile and modern solution.

Two popular authentication protocols for SaaS applications are OAuth and OpenID Connect (OIDC).

OAuth and OpenID is the only widely supported method for SaaS

Source: Verifying each answer against Chat GPT, my experience, other test banks, a written book, and weighing in the discussion from all users to create a 100% accurate guide for myself before I take the exam. (It isn't easy because of the time needed, but it is doing my diligence)

The correct answer is: SAML and RADIUS

C. OAuth and OpenID OAuth and OpenID Connect are the most suitable options to achieve these objectives: OAuth 2.0: It is an open-standard authorization protocol that allows third-party applications to access resources on behalf of a user without sharing their credentials. OAuth is widely used for granting permission to SaaS applications, supporting MFA, and implementing risk-based policies. OpenID Connect (OIDC): OIDC is a simple identity layer built on top of the OAuth 2.0 protocol, allowing clients to verify the identity of the end-user. It can be used for just-in-time provisioning. Kerberos, TACACS, and RADIUS are older protocols that lack direct support for SaaS integration and modern provisioning approaches. OTP is a type of MFA and 802.1X is a standard for network access control, both are not authentication protocols per se.

While OTP (One-Time Password) and 802.1X are valid authentication protocols, they may not be the best choice to meet the objectives listed in the question. While OTP can support MFA, it may not be the best choice for integrating with SaaS applications or performing just-in-time provisioning. While it can support risk-based policies based on location, it may not be the best choice for integrating with SaaS applications or improving the user experience. On the other hand, SAML and RADIUS are widely used protocols for enabling authentication and authorization for a wide range of scenarios, including cloud-based applications, VPN access, and wireless networks. They can support MFA, just-in-time provisioning, and risk-based policies based on location, while also improving the user experience by reducing the number of times users need to authenticate themselves.