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Juniper Exam JN0-480 Topic 2 Question 26 Discussion

Actual exam question for Juniper's JN0-480 exam
Question #: 26
Topic #: 2
[All JN0-480 Questions]

Which two statements about VXLAN VNIs are correct? (Choose two.)

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Suggested Answer: A, C

VXLAN VNIs are virtual network identifiers that are used to identify and isolate Layer 2 segments in the overlay network. VXLAN VNIs have the following characteristics:

VNIs can have over 16 million unique values.This is because VXLAN VNIs are 24-bit fields that can range from 4096 to 16777214, according to the VXLAN standard1. This allows VXLAN to support a large number of Layer 2 segments and tenants in the network.

VNIs identify a broadcast domain. This is because VXLAN VNIs are used to group the end hosts that belong to the same Layer 2 segment and can communicate with each other using VXLAN tunnels. The VXLAN tunnels are established using the VTEP information that is distributed by EVPN. The VTEPs are VXLAN tunnel endpoints that perform the VXLAN encapsulation and decapsulation.The VXLAN tunnels preserve the Layer 2 semantics and support the broadcast, unknown unicast, and multicast traffic within the same VNI2.

The following two statements are incorrect in this scenario:

VNIs identify a collision domain. This is not true, because VXLAN VNIs do not identify a collision domain, which is a network segment where data packets can collide with each other. VXLAN VNIs identify a broadcast domain, which is a network segment where broadcast traffic can reach all the devices.Collision domains are not relevant in VXLAN networks, because VXLAN uses MAC-in-UDP encapsulation and IP routing to transport the Layer 2 frames over the Layer 3 network1.

VNIs are alphanumeric values. This is not true, because VXLAN VNIs are numeric values, not alphanumeric values.VXLAN VNIs are 24-bit fields that can range from 4096 to 16777214, according to the VXLAN standard1. Alphanumeric values are values that contain both letters and numbers, such as ABC123 or 1A2B3C.


Virtual Extensible LAN (VXLAN) Overview

EVPN LAGs in EVPN-VXLAN Reference Architectures

by Sena at Sep 18, 2024, 08:22 AM

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Alyce
7 months ago
I thought VNIs were just random gibberish. Guess I need to brush up on my VXLAN knowledge.
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Ena
6 months ago
I guess VNIs are more important than I thought!
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Wilda
6 months ago
C) VNIs identify a broadcast domain
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Filiberto
6 months ago
A) VNIs can have over 16 million unique values.
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Helene
7 months ago
I'm not sure about that, I think B and D are the correct statements.
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Tu
7 months ago
VNIs are like the social security numbers of the virtual world. Gotta keep those IDs unique!
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Mary
7 months ago
Definitely A and B. VNIs are all about collision domains, not broadcast domains.
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Charlette
6 months ago
B) VNIs identify a collision domain.
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Josefa
6 months ago
Definitely A and B. VNIs are all about collision domains, not broadcast domains.
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Novella
6 months ago
B) VNIs identify a collision domain.
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Hyman
7 months ago
A) VNIs can have over 16 million unique values.
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Jacklyn
7 months ago
A) VNIs can have over 16 million unique values.
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Launa
7 months ago
I agree with Felton, VNIs can have over 16 million unique values and identify a broadcast domain.
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Felton
7 months ago
I think A and C are correct.
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Emeline
7 months ago
A and C are correct. VNIs can have over 16 million unique values and they identify a broadcast domain.
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Kiley
6 months ago
That's true. VNIs play a key role in virtual networking environments.
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Anissa
7 months ago
And they also identify a broadcast domain, which is important for network segmentation.
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Charlena
7 months ago
Yes, you're right. VNIs can indeed have over 16 million unique values.
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Alba
7 months ago
I think A and C are correct. VNIs can have over 16 million unique values and they identify a broadcast domain.
upvoted 0 times
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