Hello. There’s a question with a bad answer on the Networking Quiz.
The question asks:
Which of these CIDR blocks and/or IP addresses are invalid for a private VPC or subnet on AWS? (Choose 2)
The possible answers are
D) 192.168.1.2 with subnet mask 255.255.255.0
Technically B, C, and D are incorrect, but you were looking for B and D. Can you have 220.127.116.11 as a private IP address in AWS? I would think not.
Why not try it out… Go out to the VPC console and create a VPC using 18.104.22.168/16 CIDR. Then, if that works, create a subnet of 22.214.171.124/24. If that works, spin up an EC2 instances in that subnet and manually set the Primary IP to 126.96.36.199.
To really master this stuff, I recommend going out and trying stuff if you’re in doubt about something you see in a question.