AWS Solutions Architect Associate (SAA-C02) Exam Prep Course - 2021 UPDATED! - Amazon Web Services (AWS) Security Groups

The video tutorial explains the concept of security groups in AWS, highlighting their role as firewalls for instances within a virtual private cloud. It contrasts traditional security groups with AWS security groups, emphasizing their function in controlling network traffic through ingress and egress rules. The tutorial also covers stateful processing, where outgoing communications allow incoming responses. Additionally, it introduces network access control lists (NACLs), which apply to subnets and support both allow and deny rules, unlike security groups. NACLs are stateless and prioritize rules based on order.

What is the primary function of a security group in AWS?

• To act as a firewall for instances

• To store data securely

• To monitor network traffic

• To manage user permissions

What does the term 'ingress' refer to in the context of security groups?

• Outgoing traffic

• Incoming traffic

• Data storage

• User authentication

How do security groups handle deny rules?

• Deny rules are prioritized over allow rules

• They explicitly define deny rules

• They do not support deny rules

• Deny rules are implicit

What is a key difference between security groups and network access control lists?

• NACLs support both allow and deny rules

• Security groups are applied to subnets

• NACLs are applied to instances

• Security groups are stateless

How are rules evaluated in a network access control list?

• By the lowest numbered rule first

• Randomly

• By the highest numbered rule first

• Based on the order they are created

What happens if a rule in a NACL matches an action?

• The first matching rule is applied

• The action is allowed by default

• The action is denied by default

• All subsequent rules are evaluated

In what way do security groups and NACLs provide security in AWS?

• By monitoring system performance

• By controlling traffic flow

• By managing user access

• By encrypting data