Q69 — AWS ANS-C01 Ch.1
Question 69 of 100 | ← Chapter 1
A company hosts a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The ALB is the origin in an Amazon CloudFront distribution. The company wants to implement a custom authentication system that will provide a token for its authenticated Customers. The web application must ensure that the GET/POST requests come from authenticated customers before it delivers the content. A network Engineer must design a solution that gives the web application the ability to identify authorized customers. What is the MOST operationally e¨cient solution that meets these requirements?
- A. Use the ALB to inspect the authorized token inside the GET/POST request payload. Use an AWS Lambda function to insert a customized Header to inform the web application of an authenticated customer request.
- B. Integrate AWS WAF with the ALB to inspect the authorized token inside the GET/POST request payload. Con¦gure the ALB listener to insert A customized header to inform the web application of an authenticated customer request.
- C. Use an AWS Lambda@Edge function to inspect the authorized token inside the GET/POST request payload. Use the Lambda@Edge function Also to insert a customized header to inform the web application of an authenticated customer request. ✓
- D. Set up an EC2 instance that has a third-party packet inspection tool to inspect the authorized token inside the GET/POST request payload. Con¦gure the tool to insert a customized header to inform the web application of an authenticated customer request.
Correct Answer: C. Use an AWS Lambda@Edge function to inspect the authorized token inside the GET/POST request payload. Use the Lambda@Edge function Also to insert a customized header to inform the web application of an authenticated customer request.
Explanation
使用AWSLambda@Edge函数在CloudFront边缘位置检查GET/POST请求中的授权令牌，并插入自定义标头以通知Web应用程序请求已认证客户。这种方法能够在请求到达源服务器前验证用户身份，确保只有认证用户才能访问内容，同时保持低延迟和高效率。Lambda@Edge函数的执行位置靠近用户，减少了数据传输的延迟，提升了用户体验，并且在操作上更为高效。 查看全部