Which of the following is NOT an authentication type for Connected Systems?

Session Cookies are not considered an authentication type for Connected Systems in the context of Appian. Connected Systems in Appian typically utilize various methods for authenticating requests made to external services or APIs, and these methods are designed to interact directly with the authentication mechanisms typical of those services.

OAuth 2.0 Authorization Code Grant, Basic Authentication, and API Key systems are all standard approaches utilized for authenticating requests to external systems. OAuth 2.0 involves obtaining access tokens for authorization, Basic Authentication entails sending credentials in an encoded format, and API Keys refer to unique identifiers passed in requests to authenticate service access.

In contrast, Session Cookies are more of a session management method typically used in web applications to maintain user sessions rather than a direct authentication mechanism within the context of Connected Systems. By relying on cookies, a system manages sessions after an initial authentication event has taken place, and these typically pertain to user interaction rather than the machine-to-machine authentication scenarios that Connected Systems handle.