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NEW QUESTION # 66
ABC Company is planning a point-to-multipoint outdoor bridge deployment with standalone (autonomous)
802.11 bridge units. 802.1X/EAP will be used for bridge authentication. A Linux-based RADIUS server will be used for authentication. What device in the bridge implementation acts as the 802.1X Authenticator?

• A. All non-root bridges
• B. The root bridge
• C. The RADIUS server
• D. The Ethernet switch

Answer: B

NEW QUESTION # 67
A Wi-Fi Alliance interoperability certificate indicates that a device is a/b/g/n certified. It further indicates one transmit and receive spatial stream for both the 2.4 GHz and 5.0 GHz bands. It further indicates support for both WPA and WPA2 Enterprise and Personal. Finally, it indicates support for EAP-TLS, EAP-TTLS/MSCHAPv2, PEAPv0/EAP-MSCHAPv2 and PEAPv1/EAP- GTC.
Which one of the following statements is false?

• A. 300 Mbps is the maximum supported data rate for this device.
• B. This client device supports the ERP, OFDM, and HT physical layer specifications.
• C. This client device supports X.509 certificates for EAP authentication.
• D. This client device supports both TKIP and CCMP cipher suites.
• E. This client device supports protection mechanisms such as RTS/CTS and/or CTS-to-Self.

Answer: A

NEW QUESTION # 68
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?

• A. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for
  802.11 APs
• B. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.
• C. The edge Ethernet switches should support Ether-channel to get the best results out of the network.
• D. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.

Answer: D

Explanation:
Explanation
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. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 234; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 224.

NEW QUESTION # 69
When implementing PoE, what role is played by a switch?

• A. PSE
• B. PD
• C. Midspan injector
• D. Power splitter

Answer: A

NEW QUESTION # 70
You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?

• A. Waterfall/Spectrogram
• B. APs
• C. Real-time FFT
• D. Clients

Answer: A

NEW QUESTION # 71
What authentication method is referenced in the 802.11-2016 and 802.11-2020 specifications and is recommended for robust WI-AN client security?

• A. SSL
• B. 802.1X/EAP
• C. WEP
• D. IPSec

Answer: B

Explanation:
Explanation
The authentication method that is referenced in the 802.11-2016 and 802.11-2020 specifications and is recommended for robust WLAN client security is 802.1X/EAP. 802.1X/EAP stands for IEEE 802.1X Port-Based Network Access Control with Extensible Authentication Protocol and is a framework that provides strong authentication and dynamic encryption key generation for WLAN clients. 802.1X/EAP involves three parties: the supplicant (the client), the authenticator (the AP or the controller), and the authentication server (usually a RADIUS server). The supplicant sends its credentials (such as username and password, certificate, or token) to the authenticator, which forwards them to the authentication server. The authentication server verifies the credentials and sends a response to the authenticator, which grants or denies access to the supplicant. The authentication server also generates a master key that is used to derive encryption keys for the data frames between the supplicant and the authenticator. 802.1X/EAP supports various EAP methods that offer different levels of security and flexibility, such as EAP-TLS, EAP-PEAP, EAP-TTLS, EAP-FAST, and EAP-SIM. SSL, IPSec, and WEP are not authentication methods, but rather encryption or security protocols that are not specific to WLANs or referenced in the 802.11 specifications. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 299; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 289.

NEW QUESTION # 72
Your consulting firm has recently been hired to complete a site survey for a company desiring an indoor coverage WI-AN. Your engineers use predictive design software for the task, but the company insists on a pre-design site visit.
What task should be performed as part of the pre-design visit to prepare for a predictive design?

• A. Install at least one AP on each side of the exterior walls to test for co-channel interference through these walls
• B. Test several antenna types connected to the intended APS for use in the eventual deployment
• C. Evaluate the building materials at the facility and confirm that the floor plan documents are consistent with the actual building
• D. Collect information about the company's security requirements and the current configuration of their RADIUS and user database servers

Answer: C

NEW QUESTION # 73
What terms accurately complete the following sentence?
The IEEE 802.11-2016 standard specifies mandatory support of the _______________ cipher suite for Robust Security Network Associations, and optional use of the ________________ cipher suite, which is designed for use with pre-RSNA hardware and is deprecated.

• A. CCMP, TKIP
• B. TLS, SSL
• C. 802.1X/EAP, WEP
• D. RC5, RC4

Answer: A

NEW QUESTION # 74
When using a spectrum to look for non Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a users workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

• A. USB 3 devices in the user's work area
• B. Bluetooth devices in the user's work area
• C. Excess RF energy from a nearby AP
• D. Unintentional radiation from the PC power supply

Answer: D

NEW QUESTION # 75
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. 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.
• B. 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.
• 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: A

Explanation:
Explanation
The response that you should give to your manager's suggestion of implementing the security practices of disabling the broadcasting of the SSID in Beacons and configuring the access points not to respond to Probe Request frames that have a null SSID field is that 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. The SSID (Service Set Identifier) is a human-readable name that identifies a WLAN and allows users to connect to it. The SSID is transmitted in clear text in several types of 802.11 frames, such as Beacon frames, Probe Request frames, Probe Response frames, Association Request frames, Association Response frames, Reassociation Request frames, and Reassociation Response frames. Some people may think that hiding the SSID can improve the security of the WLAN by making it invisible to potential intruders. However, this is not true, as hiding the SSID only removes it from Beacon frames and Probe Response frames that have a null SSID field. The SSID is still present in other types of frames that can be easily captured and analyzed by any 802.11 protocol analyzer or wireless scanner tool. Therefore, hiding the SSID does not provide any real security benefit and may even cause some compatibility and performance issues for legitimate users. References: 1, Chapter 4, page 133; 2, Section 4.1

NEW QUESTION # 76
You support a WLAN using dual-band 802.11ac three stream access points. All access points have both the
2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 5 GHz and 20 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?

• A. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
• B. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
• C. His concern is valid and the company should upgrade all Ethernet links to 10 Gbps immediately.
• D. Due to 802.11 network operations and the dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gpbs Ethernet link.

Answer: D

Explanation:
Explanation
What you should tell him is that due to 802.11 network operations and the dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gbps Ethernet link. This is because the actual throughput of an 802.11 network is much lower than the theoretical data rates due to factors such as overhead, contention, interference, retransmissions, and environmental conditions. Moreover, the data rates used by devices on the network vary depending on their distance, signal quality, capabilities, and configuration.
Therefore, it is unlikely that both radios of the AP will simultaneously use the maximum data rates and saturate the 1 Gbps Ethernet link. Upgrading to a 10 Gbps Ethernet link or running a second 1 Gbps Ethernet link may be unnecessary and costly. Compressing all data before transmitting it onto the Ethernet link may introduce additional overhead and latency. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 227; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 217.

NEW QUESTION # 77
You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

• A. Calibrate the floor plan
• B. Nothing, you can simply start capturing signal readings
• C. Install iPerf
• D. Install WinPCAP

Answer: A

Explanation:
Explanation
Calibrating the floor plan is what you must do before gathering survey data after the floor plan is imported when using a site survey tool for post-implementation validation. A site survey tool is a software application that can run on a laptop, tablet, smartphone, or other device that has a Wi-Fi adapter and a GPS receiver. A site survey tool can scan the wireless environment and collect information about the detected access points and client stations, such as their SSID, BSSID, channel, signal strength, security, and data rate. A site survey tool can also measure and display various metrics of network performance, such as throughput, jitter, packet loss, delay, and SNR. A site survey tool can also use a floor plan to visualize the wireless coverage and quality in different locations on a map. A floor plan is an image file that shows the layout and dimensions of a building or an area where the WLAN is deployed. A floor plan can be imported from various sources, such as a CAD file, a PDF file, an image file, or a Google Maps screenshot. After importing a floor plan into a site survey tool, it is necessary to calibrate the floor plan before gathering survey data. Calibrating the floor plan means adjusting the scale and orientation of the floor plan to match the actual size and direction of the area.
Calibrating the floor plan can be done by using a reference point or a reference line that has a known distance or angle in the real world. Calibrating the floor plan ensures that the survey data is accurate and consistent with the physical environment. References: 1, Chapter 7, page 290; 2, Section 4.3

NEW QUESTION # 78
What features are most often configurable within 802.11 WLAN client utilities? (Choose 2)

• A. Roaming aggressiveness
• B. Co-channel interference threshold
• C. Power management
• D. Frame generator utility
• E. AES key and block size

Answer: A,C

NEW QUESTION # 79
When an ACK frame is not received by the transmitting STA, what is assumed?

• A. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
• B. The frame was correctly delivered
• C. The receiver is offline
• D. The frame was not delivered and must be retransmitted

Answer: D

NEW QUESTION # 80
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

• A. OFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well
• B. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
• C. OFDM modulation is used only in 5 GHz 802. 11 transmissions.
• D. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

Answer: C

NEW QUESTION # 81
Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?

• A. VHT
• B. HT
• C. S1G
• D. OFDM

Answer: C

Explanation:
Explanation
S1G is one of the 802.11 PHYs that is more likely to be used in an industrial deployment but not likely to be used in standard office deployments. This is because S1G stands for Sub-1 GHz, which means it operates in the frequency bands below 1 GHz, such as 900 MHz and 868 MHz. These bands offer better penetration and range than the higher frequency bands used by other 802.11 PHYs, such as 2.4 GHz and 5 GHz. This makes S1G suitable for industrial applications that require robust and reliable wireless communication in harsh environments, such as factories, warehouses, mines, and smart grids. S1G also supports low-power and low-data-rate devices, such as sensors, actuators, and meters, which are common in industrial Internet of Things (IoT) scenarios. VHT, OFDM, and HT are other 802.11 PHYs that are more commonly used in standard office deployments, as they offer higher data rates and capacity than S1G, but have lower range and penetration. References: CWNA-109 Study Guide, Chapter 3: Radio Frequency Technologies, page 751

NEW QUESTION # 82
The requirements for a WLAN you are installing state that it must support unidirectional delays of less than 150 ms and the signal strength at all receivers can be no lower than -67 dBm. What application is likely used that demands these requirements?

• A. E-Mail
• B. FTP
• C. RTLS
• D. VoIP

Answer: D

NEW QUESTION # 83
Three access points are used within a facility. One access point is on channel 11 and the other two are on channel 1. The two access points using channel 1 are on either side of the access point using channel 11 and sufficiently apart so that they do not interfere each other when they transmit frames. Assuming no other Aps are in the vicinity, is CCI still a possibility in this network and why?

• A. Yes, because the client devices connected to one of the channel 1 APs will transmit frames that reach the other channel 1 AP as well as
• B. No, because CCI only occurs in the 5 GHz frequency band
• C. No, because the Aps are far enough apart that no CCI will occur
• D. Yes, because channel 11 loops around and causes CCI with channel 1

Answer: A

NEW QUESTION # 84
What factor will have the most significant impact on the amount of wireless throughput available to each station within a BSS?

• A. The number of client stations associated to the BSS
• B. The Layer 3 protocol used by each station to transmit data over the wireless link
• C. The presence of co-located (10m away) access points on non-overlapping channels
• D. The power management settings in the access point beacons

Answer: A

NEW QUESTION # 85
You are implementing a VHT-capable AP. Which one of the following channels is available in the
802.11-2016 standard that was not available before the ratification of 802.11 ac?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: D

Explanation:
Explanation
Channel 144 is a new channel that was added to the 5 GHz band by the 802.11ac amendment, which defines the VHT (Very High Throughput) PHY for WLANs. Channel 144 has a center frequency of 5720 MHz and a bandwidth of 20 MHz. It can also be combined with adjacent channels to form wider channels of 40 MHz, 80 MHz, or 160 MHz. Channel 144 is available in some regions, such as North America and Europe, but not in others, such as Japan and China . References: [CWNA-109 Study Guide], Chapter 3: Antennas and Accessories, page 121; [CWNA-108 Study Guide], Chapter 3: Antennas and Accessories, page 115;
[Wikipedia], List of WLAN channels.

NEW QUESTION # 86
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CWNP CWNA-108 (CWNP Certified Wireless Network Administrator) exam is a certification program designed for professionals who want to advance their skills and knowledge in the field of wireless networking. CWNP Certified Wireless Network Administrator Exam certification is globally recognized and is highly valued by employers in the IT industry. It is ideal for network administrators, wireless network engineers, and network security professionals who want to gain a deeper understanding of wireless networking technologies.

 

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