Google
PROFESSIONAL-CLOUD-NETWORK-ENGINEER · Question #39
You need to restrict access to your Google Cloud load-balanced application so that only specific IP addresses can connect. What should you do?
The correct answer is C. Tag the backend instances "application," and create a firewall rule with target tag "application". 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
Submitted by rachelw· Apr 18, 2026Implementing network security
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?
Options
- ACreate a secure perimeter using the Access Context Manager feature of VPC Service Controls
- BCreate a secure perimeter using VPC Service Controls, and mark the load balancer as a service
- CTag the backend instances "application," and create a firewall rule with target tag "application"
- DLabel the backend instances "application," and create a firewall rule with the target label
How the community answered
(40 responses)- A5% (2)
- C93% (37)
- D3% (1)
Explanation
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
Topics
#Firewall Rules#Network Tags#Access Control#Network Security
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