When will you incur costs with an Elastic IP address (EIP)?
When an EIP is allocated.
When it is allocated and associated with a running instance.
When it is allocated and associated with a stopped instance.
Costs are incurred regardless of whether the EIP is associated with a running instance.
You are allowed one EIP to be attached to a running instance at no charge. otherwise, it will
incur a small fee. in this case, the instance is stopped, and thus, the EIP will be billed at the