Amazon Web Services SCS-C02 Study & Exam Dumps 2025

AWS Certified Security - Specialty Questions and Answers

Question 1

A company operates a web application that runs on Amazon EC2 instances. The application listens on port 80 and port 443. The company uses an Application Load Balancer (ALB) with AWS WAF to terminate SSL and to forward traffic to the application instances only on port 80.

The ALB is in public subnets that are associated with a network ACL that is named NACL1. The application instances are in dedicated private subnets that are associated with a network ACL that is named NACL2. An Amazon RDS for PostgreSQL DB instance that uses port 5432 is in a dedicated private subnet that is associated with a network ACL that is named NACL3. All the network ACLs currently allow all inbound and outbound traffic.

Which set of network ACL changes will increase the security of the application while ensuring functionality?

Options:

Make the following changes to NACL3:• Add a rule that allows inbound traffic on port 5432 from NACL2.• Add a rule that allows outbound traffic on ports 1024-65536 to NACL2.• Remove the default rules that allow all inbound and outbound traffic.

Make the following changes to NACL3:• Add a rule that allows inbound traffic on port 5432 from the CIDR blocks of the application instance subnets.• Add a rule that allows outbound traffic on ports 1024-65536 to the application instance subnets.• Remove the default rules that allow all inbound and outbound traffic.

Make the following changes to NACL2:• Add a rule that allows outbound traffic on port 5432 to the CIDR blocks of the RDS subnets.• Remove the default rules that allow all inbound and outbound traffic.

Make the following changes to NACL2:• Add a rule that allows inbound traffic on port 5432 from the CIDR blocks of the RDS subnets.• Add a rule that allows outbound traffic on port 5432 to the RDS subnets.

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Question 2

A company's security engineer is designing an isolation procedure for Amazon EC2 instances as part of an incident response plan. The security engineer needs to isolate a target instance to block any traffic to and from the target instance, except for traffic from the company's forensics team. Each of the company's EC2 instances has its own dedicated security group. The EC2 instances are deployed in subnets of a VPC. A subnet can contain multiple instances.

The security engineer is testing the procedure for EC2 isolation and opens an SSH session to the target instance. The procedure starts to simulate access to the target instance by an attacker. The security engineer removes the existing security group rules and adds security group rules to give the forensics team access to the target instance on port 22.

After these changes, the security engineer notices that the SSH connection is still active and usable. When the security engineer runs a ping command to the public IP address of the target instance, the ping command is blocked.

What should the security engineer do to isolate the target instance?

Options:

Add an inbound rule to the security group to allow traffic from 0.0.0.0/0 for all ports. Add an outbound rule to the security group to allow traffic to 0.0.0.0/0 for all ports. Then immediately delete these rules.

Remove the port 22 security group rule. Attach an instance role policy that allows AWS Systems Manager Session Manager connections so that the forensics team can access the target instance.

Create a network ACL that is associated with the target instance's subnet. Add a rule at the top of the inbound rule set to deny all traffic from 0.0.0.0/0. Add a rule at the top of the outbound rule set to deny all traffic to 0.0.0.0/0.

Create an AWS Systems Manager document that adds a host-level firewall rule to block all inbound traffic and outbound traffic. Run the document on the target instance.

Question 3

A company that uses AWS Organizations wants to see AWS Security Hub findings for many AWS accounts and AWS Regions. Some of the accounts are in the company's organization, and some accounts are in organizations that the company manages for customers. Although the company can see findings in the Security Hub administrator account for accounts in the company's organization, there are no findings from accounts in other organizations.

Which combination of steps should the company take to see findings from accounts that are outside the organization that includes the Security Hub administrator account? (Select TWO.)

Options:

Use a designated administration account to automatically set up member accounts.

Create the AWS Service Role ForSecurrty Hub service-linked rote for Security Hub.

Send an administration request from the member accounts.

Enable Security Hub for all member accounts.

Send invitations to accounts that are outside the company's organization from the Security Hub administrator account.

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