The Principal element of an IAM policy refers to the specific entity that should be allowed or denied permission, whereas the translates to everyone except the specified entity.
Suggested Answer:A🗳️
The element NotPrincipal that is included within your IAM policy statements allows you to specify an exception to a list of principals to whom the access to a specific resource is either allowed or denied. Use the NotPrincipal element to specify an exception to a list of principals. For example, you can deny access to all principals except the one named in the NotPrincipal element. Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html#Principal
I don't understand this question. "while the denotes everyone except the specified entity" - what does it mean? There is nothing in IAM policy about "Vendor"! I understand the purpose of principal in resource-based IAM policies.
Use the NotPrincipal element to specify the IAM user, federated user, IAM role, AWS account, AWS service, or other principal that is not allowed or denied access to a resource. The NotPrincipal element enables you to specify an exception to a list of principals. Use this element to deny access to all principals except the one named in the NotPrincipal element. The syntax for specifying NotPrincipal is the same as for specifying AWS JSON policy elements: Principal.
You cannot use the NotPrincipal element in an IAM identity-based policy. You can use it in the trust policies for IAM roles and in resource-based policies. Resource-based policies are policies that you embed directly in an IAM resource.
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