Nokia 4A0-100 Exam - Topic 1 Question 114 Discussion

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

Question #: 114
Topic #: 1

[All 4A0-100 Questions]

Which of the following statements best describes a hub?

AA device used to connect cables with signal amplification.

BA device that receives and replicates data without layer-2 header inspection.

CA device that receives and forwards data based on the MAC destination address.

DA device that receives and forwards data based on the layer-3 destination address.

Show Suggested Answer

Suggested Answer: B

A hub is a physical layer (Layer 1) networking device used to connect multiple Ethernet devices in a network. Unlike switches or routers, hubs do not inspect or process frame headers. Instead, they perform a simple task:

Receive a signal (electrical or optical) on one port

Replicate that signal identically to all other ports

This means the hub does not examine Layer 2 (MAC addresses) or Layer 3 (IP addresses) and does not perform intelligent forwarding. It merely broadcasts all incoming traffic to every other connected device, often resulting in high collision domains and poor efficiency.

Option A describes a repeater, not a hub.

Option C describes a switch (Layer 2 device).

Option D describes a router (Layer 3 device).

Option B is correct: A hub does not inspect headers and replicates traffic blindly.

Nokia IP Networking Fundamentals Study Guide -- Chapter: 'Network Devices and OSI Model'

CompTIA Network+ and Cisco CCNA foundational guides (for universally accepted hardware behavior)

by Adell at Jul 14, 2025, 09:38 PM

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Coral

2 months ago

I remember when hubs were the go-to for networking, good times!

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Eleonora

2 months ago

C is totally wrong, hubs don’t use MAC addresses.

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Tabetha

2 months ago

Definitely B, that's the classic definition of a hub.

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Junita

3 months ago

I thought it was A at first, but B makes more sense.

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Samuel

3 months ago

Wait, so hubs don’t inspect headers? That’s surprising!

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Gertude

3 months ago

I feel like option A is misleading because it mentions signal amplification, which I don’t recall being a hub's main function.

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Ettie

3 months ago

I’m a bit confused; I thought hubs were more like switches, but they don’t inspect MAC addresses, right?

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Haley

4 months ago

I remember practicing a question about hubs, and I think option B sounds right since it doesn’t look at layer-2 headers.

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Veronika

4 months ago

I think a hub just connects devices, but I'm not sure if it replicates data without inspecting headers.

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Alysa

4 months ago

I'm not entirely sure about the differences between the devices described in the options. I'll have to think this through carefully before making a selection.

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Pamela

4 months ago

I remember learning that a hub operates at layer 1, so it doesn't inspect the layer 2 headers. I'll select option B.

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Lavonna

4 months ago

A hub amplifies the signal, so option A seems like the best choice here. I feel confident about this one.

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Evelynn

5 months ago

Hmm, I'm a little confused on the difference between a hub and a switch. I think I need to review my networking concepts before answering this.

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Ryan

5 months ago

I'm pretty sure a hub is a device that receives and replicates data without layer-2 header inspection, so I'll go with option B.

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Olen

6 months ago

I think the answer is D because hubs operate at the network layer.

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Ernie

6 months ago

Option D sounds more like a router's job. A hub is definitely described best by B, just replicating the data without any fancy layer-3 stuff.

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Taryn

7 months ago

I'm not sure, but I think it might be A.

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Chau

7 months ago

Haha, a hub is like a party animal - it just takes the data and spreads it around without asking too many questions. Option B is the way to go!

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Sherita

5 months ago

User 1: Haha, a hub is like a party animal - it just takes the data and spreads it around without asking too many questions.

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Carmela

5 months ago

User 2: Definitely! It just takes the data and spreads it around.

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Leanora

5 months ago

User 1: Haha, you're right! A hub is like a party animal.

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Xuan

7 months ago

I was going to go with C, but after reading the options carefully, I think B is the correct answer. Hubs don't really care about MAC addresses, they just flood the incoming data to all ports.

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Yong

5 months ago

I agree, B is the right choice. Hubs simply replicate data without inspecting layer-2 headers.

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Rosendo

5 months ago

I think B is the correct answer. Hubs don't really care about MAC addresses, they just flood the incoming data to all ports.

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Shaun

7 months ago

I disagree, I believe the answer is C.

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Devon

7 months ago

Option B seems the most accurate description of a hub. It receives and replicates data without inspecting the layer-2 header, which is the key function of a hub.

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Joesph

7 months ago

Yes, that's right. Hubs simply receive and replicate data without any layer-2 header inspection.

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Theron

7 months ago

I think option B is correct. Hubs do replicate data without inspecting the layer-2 header.

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Elza

8 months ago

I think the answer is B.

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