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Nokia 4A0-C04 Exam - Topic 1 Question 90 Discussion

Actual exam question for Nokia's 4A0-C04 exam

Question #: 90
Topic #: 1

[All 4A0-C04 Questions]

Which of the following best describes the type of packets used by OSPF routers to exchange updates on a point-to-point link?

AIP packets sent to an IP multicast address.

BTCP packets sent to an IP multicast address.

CIP packets sent to an IP unicast address.

DUDP packets sent to an IP multicast address.

Show Suggested Answer

Suggested Answer: A

by Marylyn at Nov 24, 2025, 12:47 AM

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Candida

2 months ago

Trust me, A is the standard. Multicast is key for OSPF.

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Raylene

2 months ago

I feel confused. Why not B or D? They sound plausible too.

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Elke

2 months ago

But OSPF is designed for multicast! A is definitely right.

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Ernestine

2 months ago

I’m leaning towards C. Unicast seems more reliable.

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Dolores

2 months ago

I agree, A makes sense. Multicast is efficient.

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Crissy

3 months ago

I think it's A. OSPF uses multicast for updates.

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Noel

3 months ago

TCP isn't used for OSPF, so A is the only choice!

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Ernest

3 months ago

Wait, are we sure it's multicast? Seems off.

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Barrett

3 months ago

I thought it was unicast, but A makes sense.

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Twana

4 months ago

Definitely A, multicast is the way to go!

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Aide

4 months ago

I bet the OSPF developers were just winging it when they decided on the packet type. Multicast or unicast, who knows?

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Nickolas

4 months ago

Haha, OSPF must be using carrier pigeons to exchange updates. No packets involved at all!

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Mozell

4 months ago

B) TCP packets sent to an IP multicast address. Wait, why would OSPF use TCP? That doesn't sound right.

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German

4 months ago

I'm a bit lost on this one. Is it TCP packets or UDP packets that OSPF uses? I can't quite remember the details. Guess I'll have to make an educated guess on this one.

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Milly

5 months ago

I'm pretty confident it's A. OSPF uses IP multicast addresses like 224.0.0.5 and 224.0.0.6 to send its update packets. The other options just don't seem right for OSPF's operation.

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Corrina

5 months ago

Okay, let me walk through this step-by-step. OSPF is a link-state routing protocol, so the routers need to exchange topology updates. And they do that over a point-to-point link, which means unicast is not used. So I think the answer is A or D - multicast packets, either IP or UDP.

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Carla

5 months ago

Hmm, I'm a bit unsure on this one. I know OSPF uses multicast, but I can't remember if it's IP or UDP packets. I'll have to think this through carefully.

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Hillary

5 months ago

I’m leaning towards option A, but I’m a bit confused about the specifics of multicast versus unicast in this context.

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Adrianna

5 months ago

I feel like it might be IP packets, but I can't recall if they go to a multicast or unicast address.

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Lazaro

5 months ago

I'm pretty sure it's A - IP packets sent to a multicast address. That's how OSPF routers communicate updates, right?

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Lai

6 months ago

D) UDP packets sent to an IP multicast address. Hmm, I thought OSPF used UDP, but I could be wrong.

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Sharika

6 months ago

A) IP packets sent to an IP multicast address. I'm pretty sure that's how OSPF routers communicate.

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Wilda

6 months ago

OSPF uses IP packets for updates.

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Armando

6 months ago

C) IP packets sent to an IP unicast address. That's the correct answer, OSPF uses IP packets for its updates.

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Sheridan

24 days ago

OSPF needs reliable updates, unicast is the way to go.

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Quentin

29 days ago

Exactly! Multicast wouldn't work here.

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Joni

1 month ago

Unicast makes sense for point-to-point links.

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Stephaine

1 month ago

OSPF is all about those IP packets!

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Regenia

1 month ago

I agree, C is definitely the right choice.

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Felicia

6 months ago

I remember practicing a similar question where we discussed OSPF packet types. I think it's definitely not TCP.

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Oliva

7 months ago

I think OSPF uses multicast for sending updates, but I'm not sure if it's IP or TCP packets.

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