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| Certification Vendor: | Amazon AWS |
|---|---|
| Exam Name: | AWS Certified Security - Specialty |
| Exam Number: | SCS-C03 |
| Related Certifications: | AWS Certified Solutions Architect - Associate AWS Certified SysOps Administrator - Associate AWS Certified Security - Specialty (SCS-C02) |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Exam Price: | 300 USD |
| Exam Duration: | 170 minutes |
| Certificate Validity Period: | 3 years |
| Exam Format: | Ordering, Multiple response, Matching, Multiple choice |
| Available Languages: | Traditional Chinese, Japanese, Simplified Chinese, English, Korean |
| Passing Score: | 750 (scaled score 100–1000) |
| Recommended Training: | AWS Security Specialty Official Training |
| Exam Registration: | AWS Certification Registration |
| Sample Questions: | Amazon SCS-C03 Sample Questions |
| Exam Way: | Online proctored or onsite testing center |
| Pre Condition: | Recommended: 3–5 years of experience securing cloud solutions; prior knowledge of AWS services and security best practices; AWS Certified Solutions Architect - Associate or AWS Certified SysOps Administrator - Associate is highly recommended |
| Official Syllabus URL: | https://docs.aws.amazon.com/aws-certification/latest/security-specialty-03/security-specialty-03.html |
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NEW QUESTION # 23
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?
Answer: B
Explanation:
Amazon EC2 security groups arestateful, meaning that once a connection is established, return traffic is automatically allowed, even if the inbound rule that originally permitted the connection is later removed.
According to the AWS Certified Security - Specialty Official Study Guide and Amazon EC2 security documentation,existing connections are not terminated when security group rules change. This explains why the SSH session remains active even after the security group rules were modified, while new traffic such as ICMP ping is blocked.
To immediately and fully isolate an EC2 instance during an incident response scenario, AWS recommends usingstateless network controls. Amazon VPC network ACLs (NACLs) arestateless, which means that every packet is evaluated against the ACL rules regardless of whether the traffic is part of an existing connection. When a deny rule is added,all traffic is immediately blocked, including active sessions.
By creating a network ACL and associating it with the subnet that contains the target instance, and by adding explicit deny rules with the lowest rule numbers for both inbound and outbound traffic, the security engineer ensures thatall network communication to and from the instance is immediately interrupted. This approach satisfies the requirement to isolate the instance while preserving its runtime state and memory for forensic analysis.
Other options fail to meet the requirement because security group modifications do not terminate existing sessions, Systems Manager does not enforce network isolation, and host-level firewall changes require instance-level access and do not provide immediate, network-enforced isolation.
* AWS Certified Security - Specialty Official Study Guide
* Amazon EC2 Security Groups Documentation
* Amazon VPC Network ACL Documentation
* AWS Incident Response Best Practices
NEW QUESTION # 24
A company needs the ability to identify the root cause of security findings in an AWS account.
The company has enabled VPC Flow Logs, Amazon GuardDuty, and AWS CloudTrail. The company must investigate any IAM roles that are involved in the security findings and must visualize the findings. Which solution will meet these requirements?
Answer: C
Explanation:
Amazon Detective is a managed service designed specifically to investigate and analyze security findings by automatically correlating data from Amazon GuardDuty, AWS CloudTrail, and VPC Flow Logs. According to the AWS Certified Security - Specialty Official Study Guide, Detective enables security teams to identify root causes, anomalous behavior, and indicators of compromise through interactive visualizations.
Amazon Detective allows investigators to pivot directly to IAM roles, users, and resources that are involved in GuardDuty findings. Detective builds behavior graphs and timelines that show API activity, network traffic, and historical context, making it easier to understand how and why a security incident occurred.
NEW QUESTION # 25
A company has an AWS account that hosts a production application. The company receives an email notification that Amazon GuardDuty has detected an Impact:IAMUser/AnomalousBehavior finding in the account. A security engineer needs to run the investigation playbook for this security incident and must collect and analyze the information without affecting the application. Which solution will meet these requirements MOST quickly?
Answer: A
Explanation:
Amazon GuardDuty findings provide high-level detection of suspicious activity but are not designed for deep investigation on their own. The AWS Certified Security - Specialty documentation explains that Amazon Detective is purpose-built to support rapid investigations by automatically collecting, correlating, and visualizing data from GuardDuty, AWS CloudTrail, and VPC Flow Logs. Detective enables security engineers to analyze API calls, user behavior, and resource interactions in context without making any changes to the environment.
Using read-only credentials ensures that the investigation does not impact the production application. Amazon Detective allows investigators to pivot directly from a GuardDuty finding into a detailed activity graph, showing which IAM user made anomalous calls, what resources were accessed, and how behavior deviated from the baseline. This significantly accelerates incident investigation.
Options A and C involve applying DenyAll policies, which are containment actions and could affect application availability. Option D requires manual analysis and setup and is slower than using Amazon Detective, which is designed for immediate investigative workflows.
AWS incident response guidance recommends using Detective for rapid, non-intrusive analysis after GuardDuty findings.
NEW QUESTION # 26
A security engineer has designed a VPC to segment private traffic from public traffic. The VPC includes two Availability Zones. Each Availability Zone contains one public subnet and one private subnet. Three route tables exist: one for the public subnets and one for each private subnet.
The security engineer discovers that all four subnets are routing traffic through the internet gateway that is attached to the VPC.
Which combination of steps should the security engineer take to remediate this scenario? (Select TWO.)
Answer: B,E
Explanation:
AWS networking best practices require private subnets to access the internet only through NAT gateways located in public subnets. According to the AWS Certified Security - Specialty Study Guide, NAT gateways must be provisioned in public subnets and used as the default route for outbound traffic from private subnets.
Verifying NAT gateways in each Availability Zone ensures high availability and fault tolerance. Updating the private subnet route tables to send 0.0.0.0/0 traffic to the NAT gateway prevents direct internet access while allowing outbound connectivity.
Routing private subnet traffic directly to an internet gateway violates subnet isolation principles. NAT gateways must never be placed in private subnets.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
Amazon VPC Routing and NAT Gateways
AWS Network Segmentation Best Practices
NEW QUESTION # 27
A company runs critical workloads in an on-premises data center. The company wants to implement an AWS based disaster recovery (DR) solution that will achieve an RTO of less than 1 hour. The company needs to continuously replicate physical and virtual servers. The company must optimize costs for data storage and bandwidth usage. The DR solution must be automated.
Which solution will meet these requirements?
Answer: C
Explanation:
AWS Elastic Disaster Recovery (AWS DRS)is purpose-built for continuously replicatingphysical and virtual serversinto AWS with low RTO/RPO. It uses lightweight replication agents to stream block- level changes to a low-coststaging areain AWS, which helps optimize storage costs (only the staging resources run continuously) and reduces bandwidth usage through efficient replication mechanisms. In a disaster or test, AWS DRS can automatically launch recovery instances in AWS based on a defined blueprint (instance types, networking, security groups), enabling rapid failover workflows that commonly meetsub-hour RTOobjectives.
NEW QUESTION # 28
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