Juniper JN0-460 Exam - Topic 4 Question 2 Discussion

Actual exam question for Juniper's JN0-460 exam

Question #: 2
Topic #: 4

[All JN0-460 Questions]

Which campus fabric architecture supports Layer 3 gateways at the distribution layer?

Acampus fabric core/distribution -- centrally-routed bridging (CRB)

Bcampus fabric IP Clos

Ccampus fabric core/distribution -- edge-routed bridging (ERB)

DEVPN multihoming

Show Suggested Answer

Suggested Answer: C

In Juniper's campus fabric architectures, the location of the Layer 3 gateway (IRB) differentiates between CRB and ERB models:

Centrally-Routed Bridging (CRB): L3 gateways are placed at the core layer.

Edge-Routed Bridging (ERB): L3 gateways are placed at the distribution layer, closer to the edge.

''In the ERB model, Layer 2 gateways are deployed at the access layer, and Layer 3 gateways are deployed at the distribution layer.''

Option A (CRB): Incorrect --- L3 is at the core, not distribution.

Option B (IP Clos): Incorrect --- in 3-stage Clos, L3 is pushed to the access layer.

Option D (EVPN multihoming): Incorrect --- this is about redundancy, not gateway placement.

Option C (ERB): Correct --- L3 gateways sit at the distribution layer in the ERB architecture.

Juniper Mist AI for Wired -- Campus Fabric Architecture Models

Juniper Validated Design -- Core/Distribution CRB vs ERB Gateways

Junos OS EVPN-VXLAN Campus Fabric Deployment Guide

by Adell at Nov 24, 2025, 03:17 PM

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Clemencia

A) has solid support for Layer 3 gateways. I might go with that.

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Kate

5 days ago

I’m not sure about D) EVPN multihoming. It seems complex.

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Lavonna

10 days ago

I’m leaning towards C) ERB. It’s good for scalability.

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Gertude

15 days ago

I feel A) is the right choice. CRB is efficient for Layer 3.

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Ronald

20 days ago

I think it's B) campus fabric IP Clos. It’s widely used.

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Billi

26 days ago

Really? I didn't expect IP Clos to support Layer 3 gateways.

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Lajuana

1 month ago

Totally agree with B! Makes sense for scalability.

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Leah

1 month ago

Wait, are we sure about that? I thought ERB was also a contender.

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Laticia

2 months ago

I thought it was A) CRB, but I guess IP Clos is the way to go.

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Hollis

2 months ago

C) campus fabric core/distribution -- edge-routed bridging (ERB) is the way to go. It's like the traffic cop of the campus network.

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Nickolas

2 months ago

Ah, the joys of campus fabric architecture. It's like a maze of routers and switches, but with more acronyms than a government agency.

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Yan

2 months ago

I'm pretty sure the answer is B) campus fabric IP Clos. That's what I learned in my networking class.

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Ettie

3 months ago

EVPN multihoming? More like EVPN multi-headache!

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Evangelina

3 months ago

C) campus fabric core/distribution -- edge-routed bridging (ERB) is the correct answer.

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Kenny

3 months ago

I vaguely recall that D) EVPN multihoming could be related, but I don't think it directly supports Layer 3 gateways at the distribution layer.

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Svetlana

3 months ago

I practiced a similar question last week, and I believe it was about CRB and ERB. I feel like I might be mixing them up, though.

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Eladia

3 months ago

I think the answer might be B) campus fabric IP Clos, but I'm not entirely sure. I remember something about Layer 3 gateways being important in that context.

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Whitney

3 months ago

I'm pretty confident the answer is C. ERB puts the Layer 3 gateways at the distribution layer, which matches what the question is asking for.

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Malika

4 months ago

I'm a bit confused by all the campus fabric terminology. Is ERB the one where the routing happens at the edge rather than the core? I'll need to think this through step-by-step.

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Luke

4 months ago

Okay, I think I've got this. The key is that the question is asking about Layer 3 gateways at the distribution layer, so that points to ERB as the right answer.

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Jordan

4 months ago

It's definitely B) campus fabric IP Clos.

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Emeline

5 months ago

I thought it was A) centrally-routed bridging, but now I'm second-guessing myself. I need to remember the specifics of each architecture.

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Leanora

5 months ago

B) makes sense. IP Clos is popular in modern designs.

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Jenifer

5 months ago

Hmm, this seems like a tricky one. I'm not totally clear on the details of the different campus fabric architectures. I'll have to review my notes carefully.

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