Ravi Sir's Cards › AWS
Why prefer SNS email in the class lab?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
Read card text
What this card says
What it is
SMS costs per message and often needs leaving the SMS sandbox.
Why it matters
Email subscriptions teach the same publish/subscribe flow without surprise charges.
How / example
Keep SMS_MODE unset; confirm email on the topic before requesting OTPs.