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FC0-U71 Practice Question: Set up a small office network with 15 computers
A technician needs to set up a small office network with 15 computers. The computers should be able to communicate with each other and share a single internet connection. Which device is required to enable internet sharing?
⚠ Common exam trap
Many exam-takers confuse a switch with a router, thinking that a switch can provide internet access because it connects devices, but they overlook that internet sharing requires Layer 3 routing and NAT, which only a router can perform.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Router
A router is required to enable internet sharing because it performs Network Address Translation (NAT), which allows multiple devices on a local network to share a single public IP address provided by the ISP. The router also routes traffic between the local subnet and the internet, making it the essential device for both inter-device communication and internet access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Modem
Why it's wrong here
A modem provides physical connectivity but not routing.
- ✗
Hub
Why it's wrong here
Hubs are simple repeaters and cannot share internet.
- ✓
Router
Why this is correct
A router connects multiple networks and provides NAT for internet sharing.
- ✗
Switch
Why it's wrong here
Switches operate at Layer 2 and do not route between networks.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 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-U71 exam.