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Infoblox NIOS-DDI-Expert Exam - Topic 2 Question 17 Discussion

Actual exam question for Infoblox's NIOS-DDI-Expert exam
Question #: 17
Topic #: 2
[All NIOS-DDI-Expert Questions]

If the VRID of a HA pair is configured as 25. Which MAC address is most likely used for the virtual IP address?

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Suggested Answer: B

Comprehensive and Detailed In-Depth

VRRP defines the virtual MAC for the VIP:

Format: 00:00:5E:00:01:XX, where XX is the VRID (1-255) in hex.

VRID 25: Decimal 25 = Hex 19. Thus, MAC is 00:00:5E:00:01:19.

Options:

A: 25 is decimal, not hex---incorrect conversion. Incorrect.

B: Correctly uses hex 19 for VRID 25. Correct.

C: Random, non-VRRP format. Incorrect.

D: Multicast format, not VRRP. Incorrect.

Practical Example: In an INE lab, you'd configure VRID 25, capture VRRP packets, and verify 00:00:5E:00:01:19, troubleshooting HA.


by Zoila at Jan 05, 2026, 05:16 AM

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Glory
3 days ago
B) 00-00-5E-00-01-19 seems a bit off. The VRID is 25, so the last two octets should reflect that.
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Brittni
8 days ago
D) 01-00-5E-7F-FF-25 looks like a good option. It has the 01-00-5E prefix for multicast MAC addresses.
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Candida
13 days ago
A) 00-00-5E-25-01-00 is the correct answer. This is the standard MAC address format for a VRRP virtual IP address.
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Tamar
18 days ago
I think the answer might be D because it seems to follow the multicast MAC address pattern, but I need to double-check that.
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Alysa
23 days ago
I feel like option A could be correct since it has the right structure for a VRID, but I’m not 100% confident.
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Moira
28 days ago
I remember practicing a similar question where the MAC address was derived from the VRID, but I can't recall the exact format.
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Martha
1 month ago
I think the MAC address for the virtual IP might be related to the VRID, but I'm not completely sure how that works.
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Antonio
1 month ago
A seems like the logical choice given the VRID of 25. I'm pretty confident that's the correct answer.
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Elmira
1 month ago
I'm a bit confused on how the VRID maps to the MAC address. I'll need to think this through carefully.
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Lonna
2 months ago
Okay, I think I've got this. The virtual MAC address is based on the VRID, so A has to be the right answer.
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Cyndy
2 months ago
Hmm, I'm not totally sure about this one. I'll need to review the VRRP MAC address format again.
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Hayley
2 months ago
This one seems pretty straightforward. I'd go with option A since the VRID is 25.
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