N10-009 - Network Implementation (20% of the exam) - Section 2.3

Install and configure appropriate wireless standards and technologies, including 802.11 standards, frequencies, channels, and wireless security.

Install and configure wireless networks using the correct 802.11 standard (Wi-Fi 5, 6, and 6E), frequency band (2.4 GHz, 5 GHz, 6 GHz), and non-overlapping channels for the coverage and density required. Apply wireless security with WPA2 and WPA3, choose between personal (PSK) and enterprise (802.1X) authentication, and position access points to manage cell overlap and interference.

802.11 standards2.4/5/6 GHz bandsWPA2 vs WPA3Channel planning

Practice question for this objective

Free sampleNetwork Implementationmedium

A technician brings up a new 6 GHz SSID for the company's Wi-Fi 6E laptops and, to match the existing 5 GHz network, configures it for WPA2-Personal. The Wi-Fi 6E laptops can see other 6 GHz networks but never associate with this new SSID. What change should the technician make?

ARe-enable TKIP alongside AES so older clients can negotiate a cipher.
BReconfigure the SSID for WPA3, because the 6 GHz band does not permit WPA2. Correct
CLower the 6 GHz channel width to 20 MHz so the laptops associate.
DSwitch the 6 GHz SSID to an open network with no passphrase set.

The 6 GHz band mandates WPA3 and forbids WPA2, so a 6 GHz SSID must use SAE or another WPA3 mode before Wi-Fi 6E clients can join. Wi-Fi Alliance rules for 6 GHz require WPA3-level security on every SSID, so a 6 GHz radio configured for WPA2-Personal advertises a disallowed key-management suite; compliant Wi-Fi 6E clients therefore refuse to associate until the SSID is changed to WPA3 (SAE).

Why A is wrong: A cipher mismatch sounds like a likely cause, but TKIP is prohibited on 6 GHz and would not be used by Wi-Fi 6E clients anyway, so re-enabling it does not fix the association failure.

Why B is correct: The 6 GHz band permits only WPA3-based security such as SAE, WPA3-Enterprise, or Enhanced Open, and prohibits WPA2, WEP, TKIP, and legacy open authentication, so a WPA2-Personal 6 GHz SSID is invalid and Wi-Fi 6E clients will not associate until it is set to WPA3.

Why C is wrong: Channel settings do affect wireless behaviour, which makes this tempting, but channel width does not block association; the actual barrier here is the disallowed security mode, not the width.

Why D is wrong: Removing security may seem to simplify joining, but legacy open authentication is also barred on 6 GHz and it would expose the network, so it neither restores association nor is acceptable.

See more N10-009 practice questions, answers explained.

Exam traps in Network Implementation

Answers that look right on this material and are not. Each one is a distractor from a different question in the N10-009 bank for this domain.

It supports the same open, WEP, WPA2 and WPA3 options that are available on the 5 GHz band today.
Why it is wrong: This assumes 6 GHz mirrors 5 GHz security, but the newer band drops legacy modes, so open and WPA2 networks are not allowed on it.
The 6 GHz SSID uses a 160 MHz channel width that 802.11ac laptops cannot tune to, which hides the network from them.
Why it is wrong: 160 MHz channels do exist on 6 GHz, so this sounds plausible, but 802.11ac already supports 160 MHz channels; channel width is not why the ac laptops cannot see a 6 GHz network.
802.11g, which reaches 54 Mbps using OFDM but operates on the 2.4 GHz band rather than 5 GHz.
Why it is wrong: 802.11g also reaches 54 Mbps with OFDM, which makes it a close match, but it operates on 2.4 GHz, not the 5 GHz band the client is using.

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