SCS-C01認證資料，SCS-C01考古题推薦

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最新的 AWS Certified Security SCS-C01 免費考試真題 (Q23-Q28):

問題 #23
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. The kms:GenerateDataKey permission is missing from the EC2 instance's IAM role
• B. The ARN tag on the CMK contains the EC2 instance's ID instead of the instance's ARN
• C. The kms:Encrypt permission is missing from the EC2 IAM role
• D. The KMS CMK key policy that enables IAM user permissions is missing

答案：A

解題說明：
In a key policy, you use "*" for the resource, which means "this CMK." A key policy applies only to the CMK it is attached to References:

問題 #24
An application running on EC2 instances processes sensitive information stored on Amazon S3. The information is accessed over the Internet. The security team is concerned that the Internet connectivity to Amazon S3 is a security risk. Which solution will resolve the security concern?
Please select:

• A. Access the data through a VPN connection.
• B. Access the data through a VPC endpoint for Amazon S3
• C. Access the data through a NAT Gateway.
• D. Access the data through an Internet Gateway.

答案：B

解題說明：
Explanation
The AWS Documentation mentions the followii
A VPC endpoint enables you to privately connect your VPC to supported AWS services and VPC endpoint services powered by PrivateLink without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection. Instances in your VPC do not require public IP addresses to communicate with resources in the service. Traffic between your VPC and the other service does not leave the Amazon network.
Option A.B and C are all invalid because the question specifically mentions that access should not be provided via the Internet For more information on VPC endpoints, please refer to the below URL:
The correct answer is: Access the data through a VPC endpoint for Amazon S3 Submit your Feedback/Queries to our Experts

問題 #25
A company has a requirement to create a DynamoDB table. The company's software architect has provided the following CLI command for the DynamoDB table

Which of the following has been taken of from a security perspective from the above command?
Please select:

• A. The above command ensures data encryption in transit for the Customer table
• B. The right throughput has been specified from a security perspective
• C. Since the ID is hashed, it ensures security of the underlying table.
• D. The above command ensures data encryption at rest for the Customer table

答案：D

解題說明：
Explanation
The above command with the "-sse-specification Enabled=true" parameter ensures that the data for the DynamoDB table is encrypted at rest.
Options A,C and D are all invalid because this command is specifically used to ensure data encryption at rest For more information on DynamoDB encryption, please visit the URL:
https://docs.IAM.amazon.com/amazondynamodb/latest/developerguide/encryption.tutorial.html The correct answer is: The above command ensures data encryption at rest for the Customer table

問題 #26
You have a set of application , database and web servers hosted in AWS. The web servers are placed behind an ELB. There are separate security groups for the application, database and web servers. The network security groups have been defined accordingly. There is an issue with the communication between the application and database servers. In order to troubleshoot the issue between just the application and database server, what is the ideal set of MINIMAL steps you would take?
Please select:

• A. Check the Inbound security rules for the database security group Check the Outbound security rules for the application security group
• B. Check the both the Inbound and Outbound security rules for the database security group Check the inbound security rules for the application security group
• C. Check the Outbound security rules for the database security group
• D. Check the Outbound security rules for the database security group I Check the inbound security rules for the application security group

答案：A

解題說明：
Check the both the Inbound and Outbound security rules for the application security group Here since the communication would be established inward to the database server and outward from the application server, you need to ensure that just the Outbound rules for application server security groups are checked. And then just the Inbound rules for database server security groups are checked.
Option B can't be the correct answer. It says that we need to check the outbound security group which is not needed.
We need to check the inbound for DB SG and outbound of Application SG. Because, this two group need to communicate with each other to function properly.
Option C is invalid because you don't need to check for Outbound security rules for the database security group Option D is invalid because you don't need to check for Inbound security rules for the application security group For more information on Security Groups, please refer to below URL:
The correct answer is: Check the Inbound security rules for the database security group Check the Outbound security rules for the application security group Submit your Feedback/Queries to our Experts

問題 #27
A user has created a VPC with the public and private subnets using the VPC wizard. The VPC has CIDR
20.0.0.0/16. The public subnet uses CIDR 20.0.1.0/24. The user is planning to host a web server in the public subnet with port 80 and a Database server in the private subnet with port 3306. The user is configuring a security group for the public subnet (WebSecGrp) and the private subnet (DBSecGrp). which of the below mentioned entries is required in the private subnet database security group DBSecGrp?
Please select:

• A. Allow Inbound on port 3306 for Source Web Server Security Group WebSecGrp.
• B. Allow Outbound on port 80 for Destination NAT Instance IP
• C. Allow Inbound on port 3306 from source 20.0.0.0/16
• D. Allow Outbound on port 3306 for Destination Web Server Security Group WebSecGrp.

答案：A

解題說明：
Explanation
Since the Web server needs to talk to the database server on port 3306 that means that the database server should allow incoming traffic on port 3306. The below table from the aws documentation shows how the security groups should be set up.

Option B is invalid because you need to allow incoming access for the database server from the WebSecGrp security group.
Options C and D are invalid because you need to allow Outbound traffic and not inbound traffic For more information on security groups please visit the below Link:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC
Scenario2.html
The correct answer is: Allow Inbound on port 3306 for Source Web Server Security Group WebSecGrp.
Submit your Feedback/Queries to our Experts

問題 #28
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