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Zorluk: OrtaPlanning Network Load Balancing, Cloud DNS, and Cloud CDN

An enterprise is deploying an internal backend microservice hosted on Compute Engine instances across multiple zones within a single Virtual Private Cloud (VPC) network. The microservice receives raw TCP RPC requests directly from other internal workloads. The network architecture requires an internal load balancing mechanism that provides high availability, supports TCP health checks, and preserves the original client IP addresses without proxying or performing Layer 7 inspection. Which Google Cloud load balancing solution should you choose?

  1. Internal Passthrough Network Load BalancerCevap
  2. B
    Global External HTTP(S) Load Balancer
  3. C
    External SSL Proxy Load Balancer
  4. D
    Internal Application Load Balancer

Cevap

The Internal Passthrough Network Load Balancer is the correct choice because it provides regional, Layer 4 internal load balancing for TCP/UDP traffic without proxying, preserving the original client source IP addresses.
The Internal Passthrough Network Load Balancer is built on Andromeda network virtualization. It distributes internal Layer 4 (TCP/UDP) traffic among instances in the same region within a VPC. Because it is non-proxied (passthrough), packets arrive at the backend virtual machines with the source client IP intact, matching all workload requirements.

Adım Adım Çözüm

1
Analyze the network traffic requirements
Traffic is strictly internal within the VPC network, uses raw TCP RPC protocol, and requires client IP preservation without proxying.
Determines whether an internal or external, Layer 4 or Layer 7 load balancer is required.
2
Evaluate Google Cloud load balancer capabilities against the constraints
Layer 7 (Application) load balancers proxy HTTP/HTTPS traffic and terminate connections. External load balancers accept internet traffic. Internal Passthrough Network Load Balancers process regional internal Layer 4 TCP/UDP traffic directly to backends.
Selecting the passthrough L4 internal load balancer satisfies both the protocol requirement (raw TCP) and the architecture constraint (client IP preservation inside VPC).

Anahtar Kavram

Selecting GCP Load Balancers based on Traffic Scope (Internal vs External), OSI Layer (L4 vs L7), and Proxy Behavior (Passthrough vs Proxy)
Tahmini Süre:1m 30s
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Planning Network Load Balancing, Cloud DNS, and Cloud CDN

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