305-300 Container Virtualization Practice Question
You are troubleshooting a container networking issue. You notice that traffic from the container is not being SNATed. What should you check in the iptables rules?
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
✓
nat table, POSTROUTING chain
The POSTROUTING chain in the nat table is responsible for MASQUERADE rules used for SNAT.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
nat table, PREROUTING chain
Why it's wrong here
This is for DNAT, not SNAT.
- ✓
nat table, POSTROUTING chain
Why this is correct
MASQUERADE rules are added here to handle SNAT.
- ✗
filter table, FORWARD chain
Why it's wrong here
This handles packet filtering/dropping, not NAT.
- ✗
mangle table, OUTPUT chain
Why it's wrong here
This is for packet modification.
Visual reference
About these practice questions
One of 194 original 305-300 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official LPI exam blueprint
This 305-300 practice question is part of Courseiva's free LPI 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 305-300 exam.