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300-410 Practice Question: Which TWO configuration steps are required to…
Which TWO configuration steps are required to implement static NAT on a Cisco IOS router? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the misconception that static NAT requires an access list (like dynamic NAT) or that a global 'ip nat service' command must be enabled, when in fact static NAT only needs the static mapping and the correct interface designations (inside/outside).
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
✓
Configure ip nat inside source static <inside-local> <inside-global> in global configuration mode.
The 'ip nat inside source static' command in global configuration mode defines the static one-to-one mapping between an inside local (private) IP address and an inside global (public) IP address. This is the fundamental configuration step for static NAT, as it creates the permanent translation entry in the NAT table without requiring dynamic address pools or access lists.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure ip nat inside source static <inside-local> <inside-global> in global configuration mode.
Why this is correct
This command creates a permanent mapping between a private inside address and a public global address.
- ✓
Apply the ip nat inside command on the interface facing the internal network.
Why this is correct
This marks the interface as the inside NAT interface, enabling translation for traffic sourced from or destined to that interface.
- ✗
Apply the ip nat outside command on the interface facing the internal network.
Why it's wrong here
The outside command should be applied to the interface facing the external network, not the internal one.
- ✗
Configure an access list to match the inside local addresses for translation.
Why it's wrong here
Access lists are used for dynamic NAT or PAT, not for static NAT, which uses an explicit mapping.
- ✗
Enable the ip nat service command globally to activate NAT.
Why it's wrong here
There is no such global command; NAT is enabled by configuring translations and interface markings.
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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.