- A
A cable modem
Why wrong: A cable modem is used for cable internet, not fiber.
- B
A DSL modem
Why wrong: A DSL modem is used for DSL internet over phone lines.
- C
An Optical Network Terminal (ONT)
The ONT converts fiber optic signals to Ethernet, which then connects to a router.
- D
A satellite modem
Why wrong: A satellite modem is used with satellite dishes, not fiber.
Question 187 of 1,020
Optical Network Terminal (ONT) for Fiber Internet
This 220-1201 practice question tests your understanding of internet connection types. 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 customer is moving into a new apartment building that has a fiber optic terminal in the basement. They want the fastest possible internet. What equipment will the technician need to install inside the apartment to complete the connection?
Quick Answer
The correct answer is an Optical Network Terminal (ONT). This device is essential because fiber optic internet transmits data as light pulses, which cannot be used directly by standard home networking equipment; the ONT converts those optical signals into electrical Ethernet signals that a router can distribute. On the CompTIA A+ Core 1 220-1201 exam, this question tests your understanding of physical network infrastructure and the specific termination hardware required for different connection types—a common trap is confusing the ONT with a cable modem or DSL modem, which serve coax and phone lines respectively. When studying for the exam, remember that any fiber installation in an apartment or home will always require an ONT at the endpoint, often installed near an interior wall or in a utility closet. A simple memory tip: “ONT = Optical Network Terminal = light to electricity,” and if you see “fiber,” think “ONT,” not modem.
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
✓
An Optical Network Terminal (ONT)
Option C is correct because fiber optic internet requires an Optical Network Terminal (ONT) to convert the optical signal from the fiber line into electrical signals that standard Ethernet equipment can use. The ONT is typically installed inside the customer's premises and connects to the fiber terminal in the basement via a fiber patch cable, providing the fastest possible internet speeds.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A cable modem
Why it's wrong here
A cable modem is used for cable internet, not fiber.
- ✗
A DSL modem
Why it's wrong here
A DSL modem is used for DSL internet over phone lines.
- ✓
An Optical Network Terminal (ONT)
Why this is correct
The ONT converts fiber optic signals to Ethernet, which then connects to a router.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A satellite modem
Why it's wrong here
A satellite modem is used with satellite dishes, not fiber.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the ONT with a cable modem or DSL modem because all three are 'modems' that connect to a service provider, but only the ONT is specific to fiber optic technology.
Detailed technical explanation
How to think about this question
The ONT performs media conversion from light pulses (using wavelengths like 1310 nm and 1490 nm for GPON) to electrical Ethernet signals, often supporting speeds up to 10 Gbps. In a typical FTTH (Fiber to the Home) deployment, the ONT also handles authentication via protocols like 802.1X or PPPoE, and may include a built-in router or require a separate router for NAT and Wi-Fi. A real-world scenario: if the ONT is not properly grounded or the fiber connector is dirty, signal loss can cause intermittent connectivity, requiring a technician to clean the connector with a specialized kit.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Internet Connection Types — This question tests Internet Connection Types — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: An Optical Network Terminal (ONT) — Option C is correct because fiber optic internet requires an Optical Network Terminal (ONT) to convert the optical signal from the fiber line into electrical signals that standard Ethernet equipment can use. The ONT is typically installed inside the customer's premises and connects to the fiber terminal in the basement via a fiber patch cable, providing the fastest possible internet speeds.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This 220-1201 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 220-1201 exam.
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