This FC0-U61 practice question tests your understanding of infrastructure. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A small business wants to set up a local network with internet access. They have a modem from the ISP and need to share the connection among five computers. Which device should they use to connect all computers to the modem and manage traffic?
Router
Why wrong: A router is not needed because the modem typically handles routing; adding one may cause conflicts.
Hub
Why wrong: Hubs are outdated and inefficient; they do not manage traffic effectively.
Bridge
Why wrong: A bridge connects two separate networks, not multiple devices within a single LAN.
Switch
A switch connects devices on a LAN and is ideal for sharing internet via modem.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Switch
A switch is the correct device because it connects multiple computers in a local network and forwards frames based on MAC addresses, allowing all five computers to share the modem's internet connection efficiently. Unlike a hub, a switch creates dedicated collision domains per port, reducing traffic collisions and improving performance. The modem provides the WAN connection, and the switch handles LAN traffic distribution among the computers.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Router
Why it's wrong here
A router is not needed because the modem typically handles routing; adding one may cause conflicts.
Hub
Why it's wrong here
Hubs are outdated and inefficient; they do not manage traffic effectively.
Bridge
Why it's wrong here
A bridge connects two separate networks, not multiple devices within a single LAN.
Switch
Why this is correct
A switch connects devices on a LAN and is ideal for sharing internet via modem.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse the roles of a router and a switch, assuming a router is always needed for internet sharing, but the modem already provides the internet connection and a switch handles local traffic distribution without routing between networks.
Detailed technical explanation
A switch learns MAC addresses by examining the source address of incoming frames and populates its CAM table, allowing it to forward frames only to the specific destination port, which reduces unnecessary traffic. In contrast, a hub repeats electrical signals out all ports, forcing all devices to share the same collision domain, which can degrade performance as traffic increases. Real-world scenario: in a small office, using a switch instead of a hub ensures that a file transfer between two computers does not slow down the internet access of other computers.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Switch — A switch is the correct device because it connects multiple computers in a local network and forwards frames based on MAC addresses, allowing all five computers to share the modem's internet connection efficiently. Unlike a hub, a switch creates dedicated collision domains per port, reducing traffic collisions and improving performance. The modem provides the WAN connection, and the switch handles LAN traffic distribution among the computers.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U61 exam.
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