Quiz - What Best Describes an IAM Role?
Jun 08, 2023 • 0 Minute Read
What best describes an IAM role?A) A role is a policy that is applied directly to an AWS resource, such as an EC2 instance.B) A role is used when configuring multi-factor authentication.C) A role is something that another entity can "assume."D) A role is how you manage user access to AWS resources.What is the correct answer? Keep reading to find out if you got it right!
What is an IAM Role?
A role is an AWS identity that another entity can assume, where the entity is another AWS resource (like an EC2 instance) or even an IAM User. AWS resources cannot have permission policies directly applied to them. To receive permissions, the resources must "assume" a role which then gives them permissions that are assigned to that role through policies.This might sound similar to IAM users, but there are some differences. One main difference is that users are meant to be associated with a unique person, whereas roles can be assumed by anyone or anything that needs them.Another main difference is that roles do not have credentials (password or access keys) associated with them. When a role is assumed, credentials are automatically and dynamically generated so you don't have to worry about it. This is very beneficial, especially if you would have to otherwise hardcode credentials.Use Cases
All of this makes roles ideal for use cases like these:- Providing access from one of your AWS resources (ie: EC2 instances) to another (ie: Amazon S3).
- Giving access to an AWS IAM user in one of your accounts to another one of your accounts, so they can easily switch roles to the second account instead of having to sign in through another user.
- Granting access through identity federation to externally authenticated users (i.e. users authenticated through a mobile or web-based application).
- Providing controlled access to third-party tools for monitoring or anything else like that.