Nokia 4A0-100 Exam - Topic 4 Question 117 Discussion

Actual exam question for Nokia's 4A0-100 exam

Question #: 117
Topic #: 4

Refer to the exhibit.

An Ethernet Local Area Network (LAN) consists of the components shown in the diagram. Assuming there are no VLANs, how many broadcast domains are on this LAN?

Show Suggested Answer

Suggested Answer: A

A broadcast domain is a logical division of a network in which all nodes can reach each other with broadcast frames (Layer 2). Devices within the same broadcast domain receive broadcast packets sent by others.

In the diagram:

Multiple users connect to hubs.

Hubs are Layer 1 devices and do not break broadcast domains. They simply replicate incoming electrical signals to all ports.

Hubs are then connected to switches.

Switches, unless VLANs are configured, forward broadcasts to all ports except the incoming one, effectively keeping all devices in the same broadcast domain.

The two switches are connected together without VLAN segmentation.

Therefore:

The entire LAN depicted is a single Layer 2 broadcast domain.

There are no routers or VLANs to break or separate the domain.

Correct answer: A. 1

Nokia IP Networking Fundamentals Study Guide -- Chapter: 'LAN Switching and Broadcast Domains'

Cisco and CompTIA Network+ materials on 'Hubs vs Switches vs Routers in Broadcast Domains'

by Meghan at Nov 21, 2025, 08:26 AM

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Lili

2 months ago

But what if there are multiple switches? Could be C) 5.

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Roosevelt

2 months ago

I agree with Dalene. A) 1 makes sense.

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Dalene

2 months ago

I feel like it’s definitely A) 1. No VLANs means one broadcast domain.

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Giuseppe

2 months ago

I’m leaning towards B) 2. Could be a router involved.

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Jaime

3 months ago

I think it's A) 1. All devices are in the same network.

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Laticia

3 months ago

I thought there might be more, but yeah, it’s 1.

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Dan

3 months ago

Simple setup, just one broadcast domain.

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Felix

3 months ago

Haha, this question is a real brain-teaser. I'm going to go with my gut and say C) 5 broadcast domains.

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Gilma

4 months ago

Hmm, I'm not sure. This question is a bit tricky. I'll have to think about it more.

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Lajuana

4 months ago

D) 6 broadcast domains seems right to me. There are 6 distinct segments on the LAN.

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Lelia

4 months ago

The diagram shows 5 switches, so the answer must be C) 5 broadcast domains.

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Katlyn

4 months ago

I think the answer is B) 2 broadcast domains.

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Ernest

4 months ago

I’m pretty confident it’s just one broadcast domain, but I wish I had reviewed that section more thoroughly.

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Marylou

5 months ago

I’m not entirely sure, but I feel like there might be more than one if there are multiple switches involved.

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Johnson

5 months ago

I remember a practice question where we had to count broadcast domains, and it was similar. I’m leaning towards option A.

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Dorthy

5 months ago

I've got a strategy in mind. I'll start by identifying the different network devices and how they're connected, then determine the number of distinct broadcast domains.

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