CWNP CWNA-109 Exam Syllabus Topics:
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Reference: https://www.cwnp.com/certifications/cwna
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CWNP Wireless Network Administrator (CWNA) Sample Questions:
You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme.
What do you tell the customer?
- A. OFDMA is an optional feature of 802.11ax and most APs don't even support it
- B. If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades
- C. All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz
- D. The clients that must support OFDMA must also be upgraded to 802.11ax
Correct Answer: D 🗳️
Explanation: Only visible for Prep4pass members. You can sign-up / login (it's free).
You are a small business wireless network consultant and provide WLAN services for various companies. You receive a call from one of your customers stating that their laptop computers suddenly started experiencing much slower data transfers while connected to the WLAN. This company is located in a multi-tenant office building and the WLAN was designed to support laptops, tablets and mobile phones. What could cause a sudden change in performance for the laptop computers?
- A. A few of your customer's users have Bluetooth enabled wireless headsets.
- B. The antennas in the laptops have been repositioned.
- C. The sky was not as cloudy that day as it typically is and the sun also radiates electromagnetic waves.
- D. A new tenant in the building has set their AP to the same RF channel that your customer is using.
Correct Answer: D 🗳️
Explanation: Only visible for Prep4pass members. You can sign-up / login (it's free).
What can an impedance mismatch in the RF cables and connectors cause?
- A. Excessive VSWR
- B. Fewer MCS values in the MCS table
- C. Increased amplitude of the RF signal
- D. Increased range of the RF signal
Correct Answer: A 🗳️
Explanation: Only visible for Prep4pass members. You can sign-up / login (it's free).
What modulation and multiplexing technique, used by 802.11a/g/n/ac/ax, divides a wireless channel into multiple narrow, orthogonal subcarriers to transmit data in parallel?
- A. CCK
- B. FHSS
- C. DSSS
- D. OFDM
Correct Answer: D 🗳️
Explanation: Only visible for Prep4pass members. You can sign-up / login (it's free).
A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise floor is -96 dBm. The client is an 802.11ac client and connects to an 802.11ac AP. Both the client and AP are 2x2:2 devices. What is the likely cause of the low data rate issue?
- A. CAT5e cabling run to the AP
- B. Weak signal strength
- C. Lack of support for 802.11n
- D. Too few spatial streams
Correct Answer: B 🗳️
Explanation: Only visible for Prep4pass members. You can sign-up / login (it's free).
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