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Juniper JN0-105 Exam - Topic 7 Question 8 Discussion

Actual exam question for Juniper's JN0-105 exam
Question #: 8
Topic #: 7
[All JN0-105 Questions]

Which protocol is responsible for learning an IPv4 neighbor's MAC address?

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Suggested Answer: A

The Address Resolution Protocol (ARP) is a fundamental protocol used in IPv4 networking to map an IP address to its corresponding MAC (Media Access Control) address. When an IPv4 device wants to communicate with another device on the same local network, it uses ARP to find out the MAC address associated with the target device's IP address. This ensures that IP packets can be encapsulated into Ethernet frames and delivered to the correct hardware address on the local network segment. ARP does not apply to IPv6, where Neighbor Discovery Protocol (NDP) performs a similar function.


by Mona at Apr 14, 2024, 04:19 AM

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Emerson
3 months ago
I thought MACsec was related to security, not address resolution!
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Omega
3 months ago
NAT doesn't do that, it's for IP translation.
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Clarence
3 months ago
Wait, isn't NDP for IPv6?
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Delisa
4 months ago
Agreed, ARP is the one.
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Shanda
4 months ago
It's definitely ARP!
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Salome
4 months ago
NDP sounds familiar too, but I think that's more for IPv6. I should probably go with ARP for IPv4.
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Myra
4 months ago
I recall a practice question about ARP and how it operates in local networks. That seems like the right answer.
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Lindsey
4 months ago
I'm not entirely sure, but I feel like NAT is more about translating addresses, not learning MAC addresses.
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Lorenza
5 months ago
I think it's ARP, right? I remember studying how it maps IP addresses to MAC addresses.
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Loreta
5 months ago
Okay, let me think this through step-by-step. We're looking for the protocol that learns a neighbor's MAC address, and that has to be ARP. The other options like NAT and MACsec don't really fit the description. I'll go with A, Address Resolution Protocol.
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Paulene
5 months ago
ARP, definitely ARP. That's the protocol that allows devices on the same network to discover each other's MAC addresses based on their IP addresses. I'm confident that's the right answer here.
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Carman
5 months ago
Hmm, I'm a little unsure about this one. I know ARP is involved in mapping IP to MAC, but I can't remember if that's the exact protocol the question is asking about. I'll have to think this through carefully.
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Lavelle
5 months ago
This one seems pretty straightforward. I'm pretty sure the answer is ARP, since that's the protocol responsible for mapping IP addresses to MAC addresses.
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Chandra
5 months ago
Hmm, let me think this through. I know MetroCluster IP is a storage solution, so the NetApp AFF models are likely the correct answers. But I'm not sure about the Cisco Nexus switches - I'll have to double-check the supported components for a FlexPod setup.
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Monroe
5 months ago
I think the Service Level might be one of the types that impacts both displays and reports. It was mentioned a lot in our practice questions.
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Kenny
5 months ago
Option D sounds sketchy - creating an uncomfortable environment seems unprofessional and could compromise the interview's effectiveness.
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Goldie
5 months ago
This is a classic marketing analytics problem. I've seen these before, so I'm confident I can work through it and arrive at the correct incremental ROAS values.
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Starr
2 years ago
I believe Santos and Winfred are correct. ARP is definitely the right answer.
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Denise
2 years ago
I'm not sure, but I think it might be D) Neighbor Discovery Protocol (NDP).
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Winfred
2 years ago
I agree with Santos. ARP is used to retrieve MAC address from IP address.
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Santos
2 years ago
I think the answer is A) Address Resolution Protocol (ARP).
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Tabetha
2 years ago
I remember studying that ARP maps IP addresses to MAC addresses, so I think it's the correct answer
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Sherrell
2 years ago
I think NDP is more for IPv6, while ARP is specifically for IPv4
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Britt
2 years ago
But what about D) Neighbor Discovery Protocol (NDP)? Isn't that also used for similar purpose?
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Maia
2 years ago
I agree with ARP is responsible for learning MAC addresses
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Sherrell
2 years ago
I think the answer is A) Address Resolution Protocol (ARP)
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Talia
2 years ago
NAT? No way, that's got nothing to do with MAC addresses. This is clearly an ARP or NDP question.
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Anjelica
2 years ago
Hmm, I'm not so sure. Isn't NAT the one that translates IP addresses? I feel like that might be related to this question somehow.
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Erick
2 years ago
I always get ARP and NAT confused, but ARP is definitely the one for finding MAC addresses.
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Shawnta
2 years ago
Yes, ARP is correct. It's used to map an IPv4 address to a MAC address.
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Cecily
2 years ago
A) Address Resolution Protocol (ARP)
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Ettie
2 years ago
Oh yeah, you're right! I think it's called Neighbor Discovery Protocol, or NDP. That's the IPv6 version of ARP.
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Marshall
2 years ago
ARP? Really? I thought that was just for IPv4. Isn't there a different protocol for IPv6?
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Glendora
2 years ago
Come on, this is easy! It's got to be ARP. That's the one that resolves MAC addresses, right?
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Aleshia
2 years ago
Ugh, I hate questions about protocols! It's like they're trying to see how many random acronyms we can memorize.
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