hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to debug NAT with…
A network engineer runs the following command to debug NAT with overload:
R1# debug ip nat overload
NAT: overload: s=10.1.1.1:1234->203.0.113.1:5678, d=192.168.1.1:80 [50] NAT: overload: s=10.1.1.1:1235->203.0.113.1:5679, d=192.168.1.1:80 [51] NAT: overload: s=10.1.1.2:80->203.0.113.1:5680, d=192.168.1.1:1024 [52]
What does this output indicate?
⚠ Common exam trap
Cisco often tests the misconception that NAT with overload is 'failing' when multiple inside hosts share the same outside IP, leading candidates to incorrectly select Option B, when in fact this is the intended behavior of PAT.
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
✓
PAT is working correctly, translating multiple inside hosts to one outside IP.
The debug output shows PAT (Port Address Translation) functioning correctly: three distinct inside local addresses (10.1.1.1:1234, 10.1.1.1:1235, 10.1.1.2:80) are being translated to the same outside global address (203.0.113.1) but with unique port numbers (5678, 5679, 5680). This is the essence of NAT with overload, where multiple inside hosts share a single public IP by multiplexing on Layer 4 ports.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
PAT is working correctly, translating multiple inside hosts to one outside IP.
Why this is correct
Each inside host gets a unique source port on the outside IP.
- ✗
NAT is failing because the outside address is the same for all.
Why it's wrong here
That is expected in PAT.
- ✗
The translations are static.
Why it's wrong here
Static translations would not show port changes.
- ✗
The inside hosts are using the same port numbers.
Why it's wrong here
They are using different ports (1234, 1235, 80).
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.