220-1101 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 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.
802.11ac uses MIMO (Multiple Input Multiple Output) technology, which requires multiple spatial streams to achieve high throughput. Enabling MIMO with all antennas maximizes data rates, especially for streaming.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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.
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: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 220-1201 subnetting questions on CIDR, address ranges, and subnet selection.
Wireless Networking Technologies — This question tests Wireless Networking Technologies — CIDR notation defines the prefix length..
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. — 802.11ac uses MIMO (Multiple Input Multiple Output) technology, which requires multiple spatial streams to achieve high throughput. Enabling MIMO with all antennas maximizes data rates, especially for streaming.
What should I do if I get this 220-1201 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 220-1201 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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