Juniper JN0-683 Exam - Topic 10 Question 12 Discussion

Actual exam question for Juniper's JN0-683 exam

Question #: 12
Topic #: 10

Exhibit.

Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1 require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?

Aproxy ARP

Bproxy NDP

CGARP

DDAD

Show Suggested Answer

Suggested Answer: A

Scenario Overview:

In the exhibit, Host A is trying to resolve Host B's IP address (10.10.1.2) through ARP (Address Resolution Protocol). Normally, an ARP request would be broadcasted over the network, and the host owning the IP address (Host B) would respond.

Role of Proxy ARP:

Option A: Proxy ARP allows a router or switch (in this case, leaf1) to respond to ARP requests on behalf of another host. Leaf1, knowing the MAC address of Host B through the EVPN MAC advertisement, can reply to Host A's ARP request directly without broadcasting the request across the entire network fabric. This feature reduces unnecessary traffic and increases network efficiency.

Conclusion:

Option A: Correct---Proxy ARP enables leaf1 to respond to Host A's ARP request for Host B's IP without broadcasting over the IP fabric, thus providing the ARP response locally.

by Davida at Oct 20, 2024, 10:25 AM

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Raul

3 months ago

I disagree, proxy NDP seems more relevant here.

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Ines

3 months ago

Definitely proxy ARP, no doubt about it.

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Brandon

3 months ago

Wait, GARP? I didn't even know that was a thing!

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Lavina

4 months ago

I think it's proxy NDP, not ARP.

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Patria

4 months ago

Pretty sure it's proxy ARP.

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Ruthann

4 months ago

DAD sounds familiar, but I can't recall if it applies to ARP responses. I might be mixing it up with something else.

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Annette

4 months ago

I practiced a similar question last week, and I believe GARP was mentioned, but I don't think it's the right answer for this scenario.

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Sue

4 months ago

I'm not entirely sure, but I remember something about proxy NDP being related to IPv6. Could that be relevant here?

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Luz

5 months ago

I think this might be about proxy ARP since it allows a device to respond to ARP requests on behalf of another device.

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Pete

5 months ago

I'm a little confused by the wording of this question. What exactly does it mean for leaf1 to "send an ARP response back to Host A without having to send a broadcast frame over the fabric"? I'll need to think through the networking concepts involved to determine the correct Junos feature.

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Janna

5 months ago

Proxy ARP seems like the most likely answer here. If leaf1 can respond to the ARP request on behalf of Host B without needing to broadcast it, that would fit the description of the question. I'll go with option A.

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Jutta

5 months ago

Hmm, I'm a bit unsure about this one. I know ARP is used for address resolution, but I'm not familiar with all the Junos features mentioned. I'll have to carefully read through the options and try to reason out the best answer.

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Pearly

5 months ago

This looks like a networking question related to ARP and Junos features. I'll need to think through the different options and consider how each one might work in this scenario.

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Cherry

1 year ago

DAD? Is this a trick question or something? That's for duplicate address detection, not for responding to ARP requests. Haha, the exam writers are getting sneaky!

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