Regarding the attaching of ENI to an instance, what does ‘warm attach’ refer to?
A.
Attaching an ENI to an instance when it is stopped.
B.
This question doesn’t make sense.
C.
Attaching an ENI to an instance when it is running
D.
Attaching an ENI to an instance during the launch process
Explanation:
Best Practices for Configuring Elastic Network Interfaces
You can attach an elastic network interface to an instance when it’s running (hot attach), when it’s stopped
(warm attach), or when the instance is being launched (cold attach).
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html#best-practices-for-configuring-networkinterfaces
A is correct
But I like the answer of B too b/c whoever thought of the following must be nuts.
If you attach an ENI, the various states are named as:
Hot – running – makes perfect sense
warm – stopped – makes no sense
cold – while being launched – makes no sense