Question

Difficulty: Very hardPlanning Network Load Balancing, Cloud DNS, and Cloud CDN

A healthcare enterprise is designing a network architecture on Google Cloud to receive high-throughput medical imaging telemetry transmitted via a non-HTTP raw TCP protocol from external hospital networks across the public internet. The solution must terminate TLS/SSL encryption at the load balancing tier, support Server Name Indication (SNI) to route requests to appropriate backend Compute Engine instance groups, and scale across multiple regions. Which Google Cloud load balancer architecture should be planned to satisfy these requirements?

  1. Global External Proxy Network Load Balancer configured with a Target SSL Proxy frontendAnswer
  2. B
    External Passthrough Network Load Balancer configured with a backend service and health checks
  3. C
    Global External Application Load Balancer configured with HTTPS target proxies and URL maps
  4. D
    Internal Passthrough Network Load Balancer configured with a global access enabling flag

Answer

Global External Proxy Network Load Balancer configured with a Target SSL Proxy frontend
The Global External Proxy Network Load Balancer utilizing a Target SSL Proxy is specifically designed for non-HTTP TCP traffic that requires TLS offloading at the Google edge. It supports Server Name Indication (SNI), enabling multiple SSL certificates on a single IP address, and can route traffic to backend instance groups across multiple Google Cloud regions.

Step-by-Step Solution

1
Analyze protocol requirements
Workload uses non-HTTP raw TCP protocol.
Layer 7 HTTP(S) Application Load Balancers are eliminated because they strictly enforce HTTP compliance.
2
Analyze TLS offloading and SNI requirements
Load balancer must terminate TLS and inspect SNI host headers.
Passthrough network load balancers do not terminate TLS/SSL at the load balancer tier.
3
Analyze scope and client accessibility
Clients are external networks over the internet requiring multi-region backend scalability.
A Global External Proxy Network Load Balancer with a Target SSL Proxy meets all criteria: raw TCP, global reach, SSL termination, and SNI routing.

Key Concept

Selecting GCP Load Balancers Based on Protocol, SSL Offloading, and Traffic Scope
Estimated Time:2m 0s
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