For an inside host in Cisco NAT, which term refers to its address after translation (the globally routable address representing the inside host)?
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AInside local
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BOutside local
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CInside global
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DOutside global
Answer
Correct Answer: Inside global
Explanation
Introduction / Context:Correctly identifying NAT address roles prevents configuration mistakes and speeds troubleshooting. For inside-to-outside sessions, the inside host is represented on the public side by a translated address.
Given Data / Assumptions:
- Inside host initiates traffic.
- We need the term for its post-translation address.
- Standard Cisco NAT vocabulary is used.
Concept / Approach:Inside global is the translated, globally routable address that represents the inside host to the outside world. Inside local is the private, pre-translation address. Outside local/global describe the destination host as seen inside or globally.
Step-by-Step Solution:
Identify that we want the inside host's address after translation.Map to Cisco terms: inside + global => post-translation public-facing address.Hence, the correct answer is inside global.Verification / Alternative check:Run 'show ip nat translations' and note the 'inside global' column showing the public address bound to the inside host.
Why Other Options Are Wrong:Inside local: Pre-translation. Outside local/global: Terms for the destination host, not the source inside host.
Common Pitfalls:Assuming “global” always equals public Internet. It indicates the address visible outside the NAT boundary, which is typically public, but could be another routed domain.
Final Answer:Inside global