Build the diagnosis chain.
You deployed a service to an EC2 instance in a public subnet.
You SSH in and `curl localhost:8080` works. From your laptop,
`curl <public-ip>:8080` hangs.
Which is the MOST LIKELY first thing to check?
A) The application code has a bug.
B) The security group attached to the instance is missing an inbound
rule allowing your IP on TCP/8080.
C) The hard drive is full.
D) DNS is misconfigured.Sign in to save your code and track progress across devices.
