PCNE Configuring Network Services Practice Question
An organization needs to route traffic to a group of Compute Engine VM instances in the same zone for a high-throughput TCP application. The solution must preserve the client source IP address and support connection draining. Which load balancer type meets these requirements?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Regional external TCP/UDP Network Load Balancer
Regional external TCP/UDP Network Load Balancer (NLB) is pass-through and preserves client IP. Connection draining is supported for NLB backends. Global Proxy LBs rewrite source IP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Regional external HTTP(S) load balancer
Why it's wrong here
Regional HTTP(S) LB is also proxy-based and does not preserve client IP.
- ✗
Global TCP Proxy load balancer
Why it's wrong here
Global TCP Proxy is proxy-based and does not preserve client IP.
- ✗
Global external HTTP(S) load balancer
Why it's wrong here
Global HTTP(S) LB is proxy-based and does not preserve client IP.
- ✓
Regional external TCP/UDP Network Load Balancer
Why this is correct
NLB is pass-through, preserves client IP, and supports connection draining.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNE exam.