Google Professional Cloud Network Engineer Question 175
Single answerGoogle Cloud PlatformYou are setting up a multi-tier application in Google Cloud. The application consists of a front-end hosted on Compute Engine instances behind an HTTP(S) Load Balancer, a back-end API also hosted on Compute Engine instances, and a database in Cloud SQL. To ensure traffic between the front-end and back-end remains secure and private, you decide to use the 'include' parameter in the HTTP(S) Load Balancer's URL map configuration. What does setting the 'include' parameter achieve in this scenario?
- A
It ensures that only requests with specific query parameters are routed to the back-end API.
- B
It allows the back-end API to only accept traffic originating from the Load Balancer's internal IP address.
- C
It includes additional headers in HTTP requests forwarded to the back-end API.
- D
It defines which back-end service receives traffic based on the URL path and query string.
Show answer and explanation
Correct answer: A
Explanation
The 'include' parameter in the HTTP(S) Load Balancer's URL map configuration is used to define query parameters that must be present in incoming requests for them to be routed to a specific back-end service. In this scenario, it ensures that only requests with the required query parameters reach the back-end API, enhancing security and ensuring proper routing.
- A. Correct.
This is correct. The 'include' parameter in the URL map can specify query parameters required for routing requests to the back-end.
- B. Incorrect.
This is incorrect. The 'include' parameter does not configure source IP filtering. Such behavior would require firewall rules or IAM policies.
- C. Incorrect.
This is incorrect. The 'include' parameter does not modify HTTP headers; that would require custom header configurations.
- D. Incorrect.
This is incorrect. While the URL map does route traffic based on URL paths, the 'include' parameter specifically deals with query parameters, not path matching.