FC0-U71 Infrastructure Practice Question
A user is troubleshooting a slow internet connection and has verified that the modem is working. The user suspects that the router is causing the issue. Which TWO of the following functions are typically performed by a home router? (Select TWO.)
⚠ Common exam trap
Watch out — candidates often confuse the roles of the modem, router, and DNS server — candidates often pick 'translates domain names to IP addresses' because they associate the router with internet connectivity, but DNS resolution is a separate service.
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
✓
Assigns IP addresses via DHCP
Option B is correct because a home router typically runs a DHCP server that automatically assigns private IP addresses, subnet masks, default gateway, and DNS settings to devices on the LAN. Option D is correct because a home router performs Network Address Translation (NAT), mapping multiple private LAN addresses to the single public IP address provided by the ISP so internal hosts can share the internet connection. Option A is not a router function; DNS name-to-IP resolution is handled by DNS servers (often the ISP's or a public resolver like 8.8.8.8), though a router may merely forward DNS queries. Option C is incorrect because signal amplification is the role of a wireless access point, range extender, or repeater, not a defining router function. Option E is incorrect because converting the ISP's signal (e.g., coax, DSL, or fiber) into digital Ethernet is the modem's job, which the user already verified is working.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Translates domain names to IP addresses
Why it's wrong here
That's DNS, often provided by the router but not a primary function.
- ✓
Assigns IP addresses via DHCP
Why this is correct
A home router runs a DHCP server that dynamically allocates IP addresses, subnet masks, gateways and DNS settings to connected clients. This automatic address assignment is a core router function, confirming the user's suspicion about the device.
- ✗
Amplifies wireless signal
Why it's wrong here
Signal amplification is the job of a wireless access point or range extender, not the routing function. It is tempting because consumer routers commonly integrate an access point, but the question asks about routing functions, and the router's own Wi-Fi radio is a separate component.
- ✓
Performs NAT
Why this is correct
A home router performs network address translation, rewriting private LAN source addresses to the single public WAN address so multiple devices share one internet connection. This is a core routing function, distinct from modem modulation or DNS resolution.
- ✗
Converts ISP signal to digital
Why it's wrong here
Converting the ISP signal to digital is modem functionality, which the stem already confirms is working. It is tempting because home routers and modems are frequently combined in one gateway device, but the conversion itself belongs to the modem stage, not the router.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.