# Professional-Cloud-Network-Engineer — Question 424

**Type:** multiple_choice
**Topics:** topic_1

## Question

You need to restrict access to your Google Cloud load-balanced application so that only specific IP addresses can connect.
What should you do?

## Correct Answer

_See scenario._

## Explanation

Answer C.
This question is actually asking specifically about using firewall with a Network LB, because Network Load Balancing is a pass-through load balancer, you control access to the load balancer's backends using Google Cloud firewall rules. 

https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#firewall_rules

**Reference:** examtopics_top_comment

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Source: https://hiexam.net/q/google/Professional-Cloud-Network-Engineer/424  
Practice (tracked): https://hiexam.net/study/Professional-Cloud-Network-Engineer/practice