Answer / Vinay Shankar Mani Tripathi

Network Access Control Lists (NACLs) and Security Groups in AWS work together to control inbound and outbound network traffic for EC2 instances. NACLs are stateless, meaning they evaluate each packet individually without considering previous packets. On the other hand, Security Groups are stateful, meaning they maintain a state table of established connections to allow return traffic through. Both NACLs and Security Groups process rules in order from most specific (allow) to least specific (deny).

How many security groups are there in vpc?

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What precautions ought to I desire to make sure that the db instances in vpc are accessible by the application?

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List various layers of cloud architecture?

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