Exam 8: AWS Certified Security - Specialty (SCS-C01)

A company recently experienced a DDoS attack that prevented its web server from serving content. The website is static and hosts only HTML, CSS, and PDF files that users download. Based on the architecture shown in the image, what is the BEST way to protect the site against future attacks while minimizing the ongoing operational overhead?

A Security Architect is evaluating managed solutions for storage of encryption keys. The requirements are: -Storage is accessible by using only VPCs. -Service has tamper-evident controls. -Access logging is enabled. -Storage has high availability. Which of the following services meets these requirements?

An organization has a system in AWS that allows a large number of remote workers to submit data files. File sizes vary from a few kilobytes to several megabytes. A recent audit highlighted a concern that data files are not encrypted while in transit over untrusted networks. Which solution would remediate the audit finding while minimizing the effort required?

A company's Security Engineer is copying all application logs to centralized Amazon S3 buckets. Currently, each of the company's application is in its own AWS account, and logs are pushed into S3 buckets associated with each account. The Engineer will deploy an AWS Lambda function into each account that copies the relevant log files to the centralized S3 bucket. The Security Engineer is unable to access the log files in the centralized S3 bucket. The Engineer's IAM user policy from the centralized account looks like this: The centralized S3 bucket policy looks like this: Why is the Security Engineer unable to access the log files?

Users report intermittent availability of a web application hosted on AWS. Monitoring systems report an excess of abnormal network traffic followed by high CPU utilization on the application web tier. Which of the following techniques will improve the availability of the application? (Choose two.)

Which approach will generate automated security alerts should too many unauthorized AWS API requests be identified?

A company has a VPC with an IPv6 address range and a public subnet with an IPv6 address block. The VPC currently hosts some public Amazon EC2 instances, but a security engineer needs to migrate a second application into the VPC that also requires IPv6 connectivity. This new application will occasionally make API requests to an external, internet-accessible endpoint to receive updates. However, the security team does not want the application's EC2 instance exposed directly to the internet. The security engineer intends to create a private subnet with a custom route table and to associate the route table with the private subnet. What else does the security engineer need to do to ensure the application will not be exposed directly to the internet, but can still communicate as required?

A company maintains sensitive data in an Amazon S3 bucket that must be protected using an AWS KMS CMK. The company requires that keys be rotated automatically every year. How should the bucket be configured?

While securing the connection between a company's VPC and its on-premises data center, a Security Engineer sent a ping command from an on-premises host (IP address 203.0.113.12) to an Amazon EC2 instance (IP address 172.31.16.139). The ping command did not return a response. The flow log in the VPC showed the following: 2 123456789010 eni-1235b8ca 203.0.113.12 172.31.16.139 0 0 1 4 336 1432917027 1432917142 ACCEPT OK 2 123456789010 eni-1235b8ca 172.31.16.139 203.0.113.12 0 0 1 4 336 1432917094 1432917142 REJECT OK What action should be performed to allow the ping to work?

A Security Engineer is working with the development team to design a supply chain application that stores sensitive inventory data in an Amazon S3 bucket. The application will use an AWS KMS customer master key (CMK) to encrypt the data on Amazon S3. The inventory data on Amazon S3 will be shared of vendors. All vendors will use AWS principals from their own AWS accounts to access the data on Amazon S3. The vendor list may change weekly, and the solution must support cross-account access. What is the MOST efficient way to manage access control for the KMS CMK7?

An Amazon EC2 instance is denied access to a newly created AWS KMS CMK used for decrypt actions. The environment has the following configuration: The instance is allowed the kms:Decrypt action in its IAM role for all resources The AWS KMS CMK status is set to enabled The instance can communicate with the KMS API using a configured VPC endpoint What is causing the issue?

A Security Engineer must add additional protection to a legacy web application by adding the following HTTP security headers: -Content Security-Policy -X-Frame-Options -X-XSS-Protection The Engineer does not have access to the source code of the legacy web application. Which of the following approaches would meet this requirement?

A company has two AWS accounts: Account A and Account B. Account A has an IAM role that IAM users in Account B assume when they need to upload sensitive documents to Amazon S3 buckets in Account A. A new requirement mandates that users can assume the role only if they are authenticated with multi-factor authentication (MFA). A security engineer must recommend a solution that meets this requirement with minimum risk and effort. Which solution should the security engineer recommend?

A company has contracted with a third party to audit several AWS accounts. To enable the audit, cross-account IAM roles have been created in each account targeted for audit. The Auditor is having trouble accessing some of the accounts. Which of the following may be causing this problem? (Choose three.)

A Security Engineer is troubleshooting a connectivity issue between a web server that is writing log files to the logging server in another VPC. The Engineer has confirmed that a peering relationship exists between the two VPCs. VPC flow logs show that requests sent from the web server are accepted by the logging server, but the web server never receives a reply. Which of the following actions could fix this issue?

A security engineer is designing a solution that will provide end-to-end encryption between clients and Docker containers running in Amazon Elastic Container Service (Amazon ECS). This solution will also handle volatile traffic patterns. Which solution would have the MOST scalability and LOWEST latency?

A company's Security Engineer has been tasked with restricting a contractor's IAM account access to the company's Amazon EC2 console without providing access to any other AWS services. The contractor's IAM account must not be able to gain access to any other AWS service, even if the IAM account is assigned additional permissions based on IAM group membership. What should the Security Engineer do to meet these requirements?

A company has two software development teams that are creating applications that store sensitive data in Amazon S3. Each team's data must always be separate. The company's security team must design a data encryption strategy for both teams that provides the ability to audit key usage. The solution must also minimize operational overhead. What should the security team recommend?

For compliance reasons, an organization limits the use of resources to three specific AWS regions. It wants to be alerted when any resources are launched in unapproved regions. Which of the following approaches will provide alerts on any resources launched in an unapproved region?

A Developer who is following AWS best practices for secure code development requires an application to encrypt sensitive data to be stored at rest, locally in the application, using AWS KMS. What is the simplest and MOST secure way to decrypt this data when required?