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Difficulty: MediumPlanning Network Load Balancing, Cloud DNS, and Cloud CDN

A financial company is designing the network architecture for an internal analytics microservice hosted on Compute Engine instances across multiple subnets within a single Google Cloud region. The service receives HTTPS traffic strictly from other internal VPC workloads and on-premises hosts connected via Dedicated Interconnect. The architecture requires Layer 7 path-based request routing and internal SSL/TLS termination without allocating any public IP addresses. Which load balancer type should you plan to implement?

  1. Regional Internal Application Load BalancerAnswer
  2. B
    Internal Passthrough Network Load Balancer
  3. C
    Global External Application Load Balancer
  4. D
    Regional External Application Load Balancer

Answer

Regional Internal Application Load Balancer
The Regional Internal Application Load Balancer is a regional Layer 7 proxy load balancer. It assigns internal IP addresses within your VPC network, enabling path-based HTTP routing and TLS termination for private microservices accessible from internal VPCs and Cloud Interconnect endpoints.

Step-by-Step Solution

1
Evaluate the reachability and IP allocation requirements
The load balancer must use internal IP addresses accessible only from the local VPC and connected on-premises networks.
Security policies forbid using external public IP addresses for strictly internal microservices.
2
Evaluate protocol processing and traffic routing requirements
The solution requires Layer 7 functionality including TLS offloading and URL path-based routing.
Layer 4 passthrough load balancers pass raw TCP streams without offloading TLS or inspecting HTTP request paths.
3
Identify the matching GCP load balancing service
Select the Regional Internal Application Load Balancer.
It fulfills all regional Layer 7 requirements entirely within private network scopes.

Key Concept

Distinguishing between GCP Layer 4 vs Layer 7 load balancers and internal vs external deployment scopes.
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Topics

Planning Network Load Balancing, Cloud DNS, and Cloud CDN

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