Infoblox Exam NIOS-DDI-Expert Topic 3 Question 2 Discussion

Actual exam question for Infoblox's NIOS-DDI-Expert exam

Question #: 2
Topic #: 3

[All NIOS-DDI-Expert Questions]

What does the Stealth option do on a name server for a DNS Zone?

APrevents NS records from being automatically added to the zone file for that server

BPrevents automatic zone transfers to or from the server

CPrevents the name server from caching responses to queries

DPrevents the name server from responding to outside queries

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Suggested Answer: A

Comprehensive and Detailed In-Depth

Stealth option in NIOS DNS (Data Management > DNS > Zone > Name Servers):

A: ''Stealth'' hides the server from NS records in the zone file, making it authoritative but unlisted---useful for internal servers. Correct.

B: Zone transfers are controlled by ACLs, not Stealth. Incorrect.

C: Caching is unrelated---Stealth affects visibility, not function. Incorrect.

D: Response behavior isn't altered---still answers queries. Incorrect.

Practical Example: In an INE lab, set a stealth NS, verify NS record absence, and troubleshoot external visibility.

by Paola at Mar 20, 2025, 06:34 PM

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