- A
Set the router to 802.11n mode only.
Why wrong: 802.11n is slower than 802.11ac and does not support the higher throughput needed for 4K streaming.
- B
Enable 40 MHz channel width on the 2.4 GHz band.
Why wrong: 40 MHz on 2.4 GHz is prone to interference and does not match 802.11ac's 80 MHz or 160 MHz channels on 5 GHz for maximum speed.
- C
Use the 5 GHz band with MIMO enabled and a channel width of 80 MHz.
5 GHz with 80 MHz channels and MIMO leverages 802.11ac's capabilities, providing the highest throughput for streaming.
- D
Disable SSID broadcast to reduce overhead.
Why wrong: Hiding the SSID does not improve throughput; it only adds a minor security step and can cause connectivity issues.
Question 433 of 1,020
220-1201 Wireless Networking Technologies Practice Question
This 220-1201 practice question tests your understanding of wireless networking technologies. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 technician is setting up a wireless network for a home office that requires the fastest possible speeds for streaming 4K video. The router supports 802.11ac and has three antennas. Which configuration will yield the highest throughput?
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
✓
Use the 5 GHz band with MIMO enabled and a channel width of 80 MHz.
Option C is correct because 802.11ac operates exclusively on the 5 GHz band, and combining MIMO (multiple-input multiple-output) with an 80 MHz channel width maximizes throughput by increasing spatial streams and spectral bandwidth. This configuration supports the high data rates required for 4K video streaming, typically exceeding 1 Gbps aggregate throughput.
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.
- ✗
Set the router to 802.11n mode only.
Why it's wrong here
802.11n is slower than 802.11ac and does not support the higher throughput needed for 4K streaming.
- ✗
Enable 40 MHz channel width on the 2.4 GHz band.
Why it's wrong here
40 MHz on 2.4 GHz is prone to interference and does not match 802.11ac's 80 MHz or 160 MHz channels on 5 GHz for maximum speed.
- ✓
Use the 5 GHz band with MIMO enabled and a channel width of 80 MHz.
Why this is correct
5 GHz with 80 MHz channels and MIMO leverages 802.11ac's capabilities, providing the highest throughput for streaming.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable SSID broadcast to reduce overhead.
Why it's wrong here
Hiding the SSID does not improve throughput; it only adds a minor security step and can cause connectivity issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common misconception is that 802.11ac can use the 2.4 GHz band or that wider channels on 2.4 GHz are beneficial, when in fact 802.11ac is 5 GHz only and 40 MHz on 2.4 GHz is prone to interference and rarely yields throughput gains.
Detailed technical explanation
How to think about this question
802.11ac introduces wider channel widths (80 MHz and 160 MHz) and higher-order modulation (256-QAM) compared to 802.11n's 40 MHz maximum. MIMO in 802.11ac supports up to 8 spatial streams, but the three antennas on the router limit this to 3 streams; combined with 80 MHz channels, this yields a theoretical maximum of about 1.3 Gbps. In real-world scenarios, 4K video requires a sustained bitrate of 25–50 Mbps, so even with overhead and interference, this configuration provides ample headroom.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Wireless Networking Technologies — This question tests Wireless Networking Technologies — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the 5 GHz band with MIMO enabled and a channel width of 80 MHz. — Option C is correct because 802.11ac operates exclusively on the 5 GHz band, and combining MIMO (multiple-input multiple-output) with an 80 MHz channel width maximizes throughput by increasing spatial streams and spectral bandwidth. This configuration supports the high data rates required for 4K video streaming, typically exceeding 1 Gbps aggregate throughput.
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
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