Difference betwee sec grp and nat gateway

Question

Accepted Answer

Security groups control inbound/outbound traffic while NAT gateway allows instances in private subnets to access internet.

Security groups act as a virtual firewall for instances and control inbound/outbound traffic based on rules defined by the user.
NAT gateway allows instances in private subnets to access the internet while keeping them secure by not exposing their IP addresses to the internet.
Security groups are associated with instances while NAT gateway is associated with a subnet.
Security groups are stateful while NAT gateway is stateless.
Security groups can be used to restrict access to specific ports while NAT gateway is used to provide internet access to instances in private subnets.

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