Which HTTP header should the developer use for this analysis?

An ecommerce application is running behind an Application Load Balancer. A developer observes some unexpected load on the application during non-peak hours. The developer wants to analyze patterns for the client IP addresses that use the application.

Which HTTP header should the developer use for this analysis?
A . The X-Forwarded-Proto header
B . The X-F Forwarded-Host header
C . The X-Forwarded-For header
D . The X-Forwarded-Port header

View Answer

Answer: C

Explanation:

The HTTP header that the developer should use for this analysis is the X-Forwarded-For header. This header contains the IP address of the client that made the request to the Application Load Balancer. The developer can use this header to analyze patterns for the client IP addresses that use the application. The other headers either contain information about the protocol, host, or port of the request, which are not relevant for the analysis.

Reference: How Application Load Balancer works with your applications