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

Which of the following statements best describes a hub?
B) A device that receives and replicates data without layer-2 header inspection.
A) A device used to connect cables with signal amplification.
C) A device that receives and forwards data based on the MAC destination address.
D) A device that receives and forwards data based on the layer-3 destination address.

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?

Show Suggested Answer Hide 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
8 months ago
I remember when hubs were the go-to for networking, good times!
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Eleonora
9 months ago
C is totally wrong, hubs don’t use MAC addresses.
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Tabetha
9 months ago
Definitely B, that's the classic definition of a hub.
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Junita
9 months ago
I thought it was A at first, but B makes more sense.
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Samuel
9 months ago
Wait, so hubs don’t inspect headers? That’s surprising!
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Gertude
9 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
10 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
10 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
10 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
10 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
11 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
11 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
11 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
11 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
1 year ago
I think the answer is D because hubs operate at the network layer.
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Ernie
1 year 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
1 year ago
I'm not sure, but I think it might be A.
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Chau
1 year 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
11 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
11 months ago
User 2: Definitely! It just takes the data and spreads it around.
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Leanora
12 months ago
User 1: Haha, you're right! A hub is like a party animal.
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Xuan
1 year 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
11 months ago
I agree, B is the right choice. Hubs simply replicate data without inspecting layer-2 headers.
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Rosendo
11 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
1 year ago
I disagree, I believe the answer is C.
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Devon
1 year 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
1 year ago
Yes, that's right. Hubs simply receive and replicate data without any layer-2 header inspection.
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Theron
1 year ago
I think option B is correct. Hubs do replicate data without inspecting the layer-2 header.
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Elza
1 year ago
I think the answer is B.
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