Free CWNA-108 Exam Braindumps certification guide Q&A
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How much CWNA® - Certified Wireless Network Administrator Cost
The cost of the CWNA® - Certified Wireless Network Administrator is $150. For more information related to exam price, please visit the official website as the cost of exams may be subjected to vary county-wise.
NEW QUESTION 82
You are deploying a WLAN with the access points configured for 10 mW of output power on the
2.4 GHz radios and 20 mW of output power on the 5 GHz radios. Some semi- directional antennas are also in use. What kind of deployment is described?
- A. Residential
- B. High density
- C. SOHO
- D. Standard office
Answer: B
NEW QUESTION 83
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
- A. An impedance mismatch between components in the RF system
- B. High output power at the transmitter and use of a low-gain antenna
- C. A Voltage Standing Wave Ratio (VSWR) of 1:1
- D. The use of cables longer than one meter in the RF system
Answer: A
NEW QUESTION 84
During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-802.11 device?
- A. Channel occupied
- B. Receive sensitivity
- C. Airtime utilization
- D. Protocols utilized
Answer: A
NEW QUESTION 85
In a WALN security, what authentication method always creates Layer2 dynamic encryption keys?
- A. Shared Key
- B. EAP-TLS
- C. HTTPS captive portal
- D. WEP
Answer: D
NEW QUESTION 86
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- B. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- C. OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.
- D. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Answer: C
Explanation:
Explanation
NEW QUESTION 87
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
- A. 1 and 5
- B. 2 and 8
- C. 7 and 11
- D. 4 and 6
Answer: D
NEW QUESTION 88
In an infrastructure Basic Service Set (BSS), how does the passive scanning process occur?
- A. Access points broadcast Beacons on a single channel for which they are programmed. Nearby client stations listen for Beacon frames and record information found in the Beacons for use in the association process.
- B. Client stations broadcast Probe Request frames on all supported channels in the regulatory domain. Nearby access points respond with Probe Response frames. Client stations record information in the Probe Response frames for use in the association process.
- C. Access points broadcast Beacons on all channels of each radio within the regulatory domain.
Nearby client stations record information found in the Beacons for use in the association process. - D. Client stations broadcast Probe Request frames on the single channel for which they are programmed. Nearby access points respond on that channel with Probe Response frames. Client stations record information found in the Probe Response frames for use in the association process.
Answer: A
NEW QUESTION 89
You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion?
- A. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.
- B. Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons frames. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
- C. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposing the WPA key.
- D. This security practice prevents manufacturers' client utilities from detecting the SSID. As a result, the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.
Answer: B
NEW QUESTION 90
You are attempting to locate the cause of a performance problem in two WLAN cells in a mostly overlapping coverage area. You note that one AP is on channel 1 and the other is on channel 2.
When you document yoy findings, what term do you use to describe the problem in this configuration?
- A. Bluetooth interference
- B. CCI
- C. ACI
- D. Non-Wi-Fi interference
Answer: C
Explanation:
Adjacent channel interference is more serious and occurs when 2 or more AP's are on overlapping channels, for example channel 1 + 4 on the 2.4Ghz band. ACI creates overlap in the frequency space causing corrupted data and layer 2 re-transmissions.
NEW QUESTION 91
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 802.11acAP. Both the client and AP are 2x2:2 devices.
What is the likely cause of the low data rate issue?
- A. Weak signal strength
- B. Lack of support for 802.11n
- C. Too few spatial streams
- D. CAT5e cabling run to the AP
Answer: A
NEW QUESTION 92
Lynne runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot. Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?
- A. Enable station-to-station traffic blocking by the access points in the hotel.
- B. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
- C. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
- D. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
Answer: A
NEW QUESTION 93
What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?
- A. SIG
- B. TVHT
- C. DSSS
- D. DMG
Answer: C
Explanation:
https://www.cwnp.com/802-11ac-vht-just-the-facts/
NEW QUESTION 94
What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?
- A. Directed Radiation
- B. Active Amplification
- C. Beam Digression
- D. Passive Gain
Answer: D
NEW QUESTION 95
What features are most often configurable within 802.11 WLAN client utilities? (Choose 2)
- A. Power management
- B. AES key and block size
- C. Frame generator utility
- D. Roaming aggressiveness
- E. Co-channel interference threshold
Answer: A,D
NEW QUESTION 96
An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss.
The cable is connected to an antenna with 16 dBi of gain.
What is the EIRP power output?
- A. 250 mW
- B. 1000 mW
- C. 500 mW
- D. 2 W
Answer: B
NEW QUESTION 97
You are evaluating access points for use in the 5GHz frequency band.
What PHY supports this band and supports 80 MHz channels?
- A. HT
- B. OFDM
- C. ERP
- D. VHT
Answer: D
NEW QUESTION 98
......
Career Opportunities
Those candidates who pass the CWNA-108 exam will be awarded the Certified Wireless Network Administrator (CWNA) certification. There are numerous opportunities that the certified professionals can explore. Some of the job titles that are tailored for this certificate include a Network Engineer, a System Engineer, a Senior Network Administrator, and a Network Administrator, among others. The salary range for these positions is between $71,000 and $102,000 per annum.
Exam Syllabus
The CWNA-108 exam covers seven knowledge domains. Each of these areas has detailed topics and subtopics that must be understood to improve your performance in the certification test. The highlights of these sections are as follows:
RF Technologies: 15%
This is the first topic to deal with that will evaluate the following skills that you need to possess:
- Apply the fundamental concepts of the Radio Frequency measurement and mathematics: This subtopic focuses on Watt & milliwatt, RSSI, SNR, Decibel, Noise floor, dBm & dBi, as well as EIRP;
- Identify and describe the basic attributes of Radio Frequency (RF) and RF behaviors: The concepts covered in this area include multipath & RF interference, attenuation, amplification, return loss, gain & loss, free space path loss, and absorption, among others;
- Establish RF signal attributes to antennas: This means that you should know about passive gain, MINO, radio chains, polarization, beamwidths, transmit beamforming, passive gain, spatial multiplexing, and maximal ratio combining;
- Describe and use the functionality of the RF antennas, accessories, and antenna systems: The area includes highly directional antennas, Omni-directional and semi-directional antennas, RF connectors & cables, Antenna orientation, grounding wires/rods, and Lightning arrestors.
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