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FC0-U71 Practice Question: Which THREE of the following are primary…
Which THREE of the following are primary functions of a network router?
⚠ Common exam trap
CompTIA often tests the distinction between a router's core function (IP forwarding) and its optional features (like NAT, DHCP, or wireless), leading candidates to incorrectly include or exclude options based on common all-in-one device assumptions.
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
✓
Forwarding packets based on IP addresses
B is correct because a router's primary function is to forward packets between different networks by examining the destination IP address in the packet header and consulting its routing table to determine the best path. This Layer 3 (Network Layer) operation is fundamental to routing, distinguishing it from switches that operate at Layer 2.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Providing wireless access to clients
Why it's wrong here
Wireless access is provided by an access point, not a router's primary function.
- ✓
Forwarding packets based on IP addresses
Why this is correct
Routers make forwarding decisions based on destination IP.
- ✗
Connecting devices within the same local network
Why it's wrong here
This is a switch function; routers connect different networks.
- ✓
Performing Network Address Translation (NAT)
Why this is correct
Routers commonly translate private IPs to public for internet access.
- ✓
Assigning IP addresses via DHCP
Why this is correct
Many routers include a DHCP server for automatic IP assignment.
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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.