A SysOps Administrator runs a web application that is using a microservices approach whereby different responsibilities of the application have been divided in a separate microservice running on a…

Question

Options

• AUse Amazon CloudFront to log the URL and forward the request.
• BUse Amazon CloudFront to rewrite the header based on the microservice and forward the
• CUse an Application Load Balancer (ALB) and do path-based routing.
• DUse a Network Load Balancer (NLB) and do path-based routing.

• A
  7% (4)
• B
  17% (9)
• C
  72% (39)
• D
  4% (2)

Explanation

An Application Load Balancer (ALB) natively supports path-based routing (e.g., /api/users → Service A, /api/orders → Service B), making it the purpose-built, low-overhead solution for routing HTTP/HTTPS traffic to different EC2 instances based on URL path - no custom logic required.

Why the distractors are wrong:

• A & B (CloudFront): CloudFront is a CDN designed for content delivery and caching, not microservice routing. Using it for URL-based forwarding to EC2 services adds unnecessary complexity and cost for a purely internal routing problem.
• D (NLB): A Network Load Balancer operates at Layer 4 (TCP/UDP) and has no awareness of HTTP paths - it cannot perform path-based routing at all, only port/IP-based routing.

Memory tip: Think "ALB = Application layer = Aware of URLs." Whenever you see HTTP path routing, microservices, or content-based routing in an exam question, ALB is almost always the answer. NLB is for raw TCP speed/performance, not smart HTTP routing.

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