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NEW QUESTION: 1
You work for a company that has retail department stores.
You are developing an Azure Machine Learning experiment to predict seasonal sales.
You need to address a model overfitting issue by using the following two solutions:
* Solution 1: Controls the penalty for complexity, which, when successful, prevents overfitting
* Solution 2: Separates model selection from testing, causing a more conservative estimate of generalization Which method should you use for each solution? To answer, drag the appropriate methods to the correct solutions. Each method may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.

Answer:
Explanation:

NEW QUESTION: 2
A Solution Architect is designing a two-tier application for maximum security, with a web tier running on EC2
instances and the data stored in an RDS DB instance. The web tier
should accept user access only through HTTPS connections (port 443) from the Internet, an the data must be
encrypted in transit to and from the database.
What combination of steps will MOST securely meet the stated requirements? (Choose
two.)
A. Enforce Transparent Data Encryption (TDE) on the RDS database.
B. Create a customer master key in AWS KMS and apply it to encrypt the RDS instance.
C. Configure the web servers to communicate with RDS by using SSL, and issue certificates to the web tier
EC2 instances.
D. Create a network ACL that allows inbound traffic only over port 443.
E. Create a security group for the web tier instances that allows inbound traffic only over port 443.
Answer: C,E

NEW QUESTION: 3

A. Option D
B. Option B
C. Option A
D. Option E
E. Option C
Answer: E

NEW QUESTION: 4
企業のWebサイトを使用して製品を一般に販売しています。サイトはApplication Load Balancer（ALB）の背後にあるAuto ScalingグループのAmazon EC2インスタンスで実行されています。AmazonCloudFrontディストリビューションもあり、AWS WAFがSQLインジェクション攻撃から保護するために使用されていますALBはCloudFrontディストリビューションの起源です。セキュリティログの最近のレビューにより、ウェブサイトへのアクセスをブロックする必要がある外部の悪意のあるIPが明らかになりました。ソリューションアーキテクトがアプリケーションを保護するために何をすべきですか？」
A. CloudFrontディストリビューションのネットワークACLを変更して、悪意のあるIPアドレスの拒否ルールを追加します
B. ALBの背後にあるターゲットグループのEC2インスタンスのセキュリティグループを変更して、悪意のあるIPアドレスを拒否します
C. ALBの背後にあるターゲットグループのEC2インスタンスのネットワークACLを変更して、悪意のあるIPアドレスを拒否します
D. AWS WAFの構成を変更して、悪意のあるIPアドレスをブロックするIP一致条件を追加します
Answer: D
Explanation:
Reference:
https://aws.amazon.com/blogs/aws/aws-web-application-firewall-waf-for-application-loadbalancers/
https://docs.aws.amazon.com/waf/latest/developerguide/classic-web-acl-ip-conditions.html A new version of the AWS Web Application Firewall was released in November 2019. With AWS WAF classic you create "IP match conditions", whereas with AWS WAF (new version) you create "IP set match statements". Look out for wording on the exam.
The IP match condition / IP set match statement inspects the IP address of a web request's origin against a set of IP addresses and address ranges. Use this to allow or block web requests based on the IP addresses that the requests originate from.
AWS WAF supports all IPv4 and IPv6 address ranges. An IP set can hold up to 10,000 IP addresses or IP address ranges to check.
CORRECT: "Modify the configuration of AWS WAF to add an IP match condition to block the malicious IP address" is the correct answer.
INCORRECT: "Modify the network ACL on the CloudFront distribution to add a deny rule for the malicious IP address" is incorrect as CloudFront does not sit within a subnet so network ACLs do not apply to it.
INCORRECT: "Modify the network ACL for the EC2 instances in the target groups behind the ALB to deny the malicious IP address" is incorrect as the source IP addresses of the data in the EC2 instances' subnets will be the ELB IP addresses.
INCORRECT: "Modify the security groups for the EC2 instances in the target groups behind the ALB to deny the malicious IP address." is incorrect as you cannot create deny rules with security groups.
References:
https://docs.aws.amazon.com/waf/latest/developerguide/waf-rule-statement-type-ipset-match.html If you want to allow or block web requests based on the IP addresses that the requests originate from, create one or more IP match conditions. An IP match condition lists up to 10,000 IP addresses or IP address ranges that your requests originate from. Later in the process, when you create a web ACL, you specify whether to allow or block requests from those IP addresses.
AWS Web Application Firewall (WAF) - Helps to protect your web applications from common application-layer exploits that can affect availability or consume excessive resources. As you can see in my post (New - AWS WAF), WAF allows you to use access control lists (ACLs), rules, and conditions that define acceptable or unacceptable requests or IP addresses. You can selectively allow or deny access to specific parts of your web application and you can also guard against various SQL injection attacks. We launched WAF with support for Amazon CloudFront
https://docs.aws.amazon.com/waf/latest/developerguide/classic-web-acl-ip-conditions.html
https://aws.amazon.com/blogs/aws/aws-web-application-firewall-waf-for-application-load-balancers/