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| Certification Vendor: | CWNP |
|---|---|
| Exam Name: | CWNA-109 Certified Wireless Network Administrator Exam |
| Exam Number: | CWNA-109 |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 60-90 |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Related Certifications: | CWDP CWNE CWSP CWAP |
| Exam Format: | Multiple Choice, Multiple Response |
| Exam Price: | USD 300 (approx.) |
| Passing Score: | 70% |
| Recommended Training: | CWNP Official CWNA Training CWNA Study Guide Resources |
| Exam Registration: | Pearson VUE Registration CWNP CWNA Certification Page |
| Sample Questions: | CWNP CWNA-109 Sample Questions |
| Exam Way: | Computer-based exam delivered via Pearson VUE testing centers or online proctored exam |
| Pre Condition: | No formal prerequisite required; basic networking knowledge recommended |
| Official Syllabus URL: | https://www.cwnp.com/certifications/cwna/ |
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169. Frage
You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems.
Based on this information, what is the likely cause of the problem?
Antwort: B
Begründung:
The likely cause of the problem is that the external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use. USB 3.0 devices are known to generate radio frequency interference (RFI) in the 2.4 GHz band due to their high data transfer rates and harmonics. This RFI can increase the noise floor and degrade the signal-to-noise ratio (SNR) of WLAN devices operating in the same band. This can result in lower data rates, reduced throughput, increased retransmissions, and poor performance. The problem may not occur outside of business hours or on the user's home network because of different usage patterns or environmental factors. References: [CWNP Certified Wireless Network Administrator Official StudyGuide:
ExamCWNA-109], page 527; [CWNA: Certified Wireless Network Administrator Official Study Guide:
ExamCWNA-109], page 497.
170. Frage
ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using
802.3 PoE.
After hearing this information, what immediate concerns do you note?
Antwort: D
Begründung:
An immediate concern that you note after hearing this information is that the power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices. PoE stands for Power over Ethernet and is a technology that allows Ethernet switches to deliver power along with data to devices such as VoIP phones and 802.11 access points. PoE devices are classified into different classes based on their power consumption and output. The edge switches have a limited power budget that determines how many PoE devices they can support simultaneously. If the power budget is exceeded, some PoE devices may not receive enough power or may shut down unexpectedly. Therefore, it is important to plan and monitor the power budget in the edge switches based on the number and class of PoE devices connected to them. Using Ether- channel, placing switches in optimal locations, or avoiding distortion are not immediate concerns related to PoE devices.
171. Frage
What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
Antwort: D
Begründung:
When a station scans for available wireless networks, it listens for beacon frames sent by APs. A beacon frame contains information about the BSS, such as SSID, supported rates, channel, security, etc. The station also measures the signal strength of the beacon frames, which indicates how well the station can communicate with the AP. The signal strength is usually expressed in dBm or RSSI units. The higher the signal strength, the better the connection quality and performance. Therefore, the station can use the signal strength of AP beacons as the primary metric to select the best AP for connectivity to the desired BSS12. References: CWNA-109 Study Guide, Chapter 6: Wireless LAN Devices and Topologies, page
249; CWNA-109 Study Guide, Chapter 6: Wireless LAN Devices and Topologies, page 243.
172. Frage
What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?
Antwort: A
Begründung:
TVHT stands for Television Very High Throughput and it is a PHY defined by the 802.11af amendment. It uses the TV white space (TVWS) spectrum in the VHF and UHF bands between
54 and 790 MHz, which are not in use by broadcast video signals at the time. It can provide long- range and low-power connectivity for WLAN devices.
173. Frage
What phrase defines Equivalent Isotropically Radiated Power (EIRP)?
Antwort: A
Begründung:
"Effective, or Equivalent Isotropically Radiated Power (EIRP) is the maximum amount of power that could be radiated from an antenna, given its antenna gain and the transmitter power of the RF system." Also: "Effective Isotropic Radiated Power or Equivalent Isotropic Radiated Power (EIRP) is the measured power radiated in a single direction by an ideal isotropic antenna. ... It is the antenna's maximum power output in the direction with the highest antenna gain."
174. Frage
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CWNA-109 Fragen&Antworten: https://www.zertpruefung.de/CWNA-109_exam.html
BONUS!!! Laden Sie die vollständige Version der Zertpruefung CWNA-109 Prüfungsfragen kostenlos herunter: https://drive.google.com/open?id=1nh7lHzlX5e9UKou0UsZ620ntr-RvIKCu