Prepare Important Exam with CWNA-108 Exam Dumps(2023)
Pass Exam Questions Efficiently With CWNA-108 Questions
CWNP CWNA-108 certification is an excellent choice for professionals who want to enhance their wireless networking skills and knowledge. CWNP Certified Wireless Network Administrator Exam certification provides a solid foundation in wireless networking concepts and prepares candidates for more advanced certifications in wireless networking. CWNP Certified Wireless Network Administrator Exam certification is also an excellent way to stand out in a highly competitive job market and to demonstrate to employers that you have the skills and knowledge to manage and maintain a wireless network.
NEW QUESTION # 70
XYZ Corporation is experiencing connectivity problems with their existing building-to-building bridge link. A concrete wall on the roof of one building is partially blocking the Fresnel Zone, and the connection is dropping many frames. The administrator moves the antenna to an area not obstructed by the concrete wall and then realizes the RF cable cannot reach the new location.
If an extension cable is added to move the antenna, what are the likely results?
- A. The likelihood of a direct lightning strike will increase.
- B. The antenna's azimuth beamwidth will decrease.
- C. The size of the Fresnel zone will increase.
- D. The data throughput rate will increase because VSWR will decrease.
- E. The Equivalent Isotropically Radiated Power (EIRP) will decrease.
Answer: E
NEW QUESTION # 71
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?
- A. A minimum antenna gain of 11 dBi at both endpoints
- B. Grid antennas ateach endpoint
- C. A Fresnel Zone that is at least 60% clear of obstructions
- D. Minimum output power level of 2 W
Answer: C
Explanation:
Explanation
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers) is a Fresnel Zone that is at least 60% clear of obstructions. The Fresnel Zone is an elliptical-shaped area around the line-of-sight path between two antennas that reflects and refracts the RF waves. The Fresnel Zone radius depends on the frequency of the RF signal and the distance between the antennas. For optimal performance, the Fresnel Zone should be at least 60% clear of any obstructions that may cause interference, attenuation, or multipath fading. The minimum output power level, antenna gain, and antenna type may vary depending on the environmental conditions and regulatory constraints, but they are not always required for a high quality RF link. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 75; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 65.
NEW QUESTION # 72
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?
- A. NTP
- B. DHCP
- C. GRE
- D. SNMP
Answer: B
Explanation:
Explanation
DHCP (Dynamic Host Configuration Protocol) is a commonly used method to locate the controllers by the APs in a WLAN that is implemented using wireless controllers. DHCP is a protocol that allows a device to obtain an IP address and other network configuration parameters from a server. In a wireless controller scenario, the APs can use DHCP to request an IP address from a DHCP server, which can also provide the IP address or hostname of the wireless controller as an option in the DHCP response. This way, the APs can discover the wireless controller and establish a connection with it. Alternatively, the APs can also use other methods to locate the wireless controller, such as DNS (Domain Name System), broadcast or multicast discovery, or manual configuration. References: 1, Chapter 8, page 309; 2, Section 5.2
NEW QUESTION # 73
What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
- A. Throughput speed in Mbps.
- B. FCS errors in frames transmitted to and from the AP.
- C. PING latency when testing against an Internet server.
- D. Signal strength of AP beacons received.
Answer: D
NEW QUESTION # 74
What is a common feature of an 802.11 WLAN client utility? (Choose 2)
- A. Link statistics display
- B. VLAN configuration
- C. Spectrum analyzer utility
- D. Real-time retry monitor
- E. AP Signal strength meter
Answer: A,E
NEW QUESTION # 75
To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based in their department.
What WLAN feature would allow the network administrator to accomplish this task?
- A. RBAC
- B. WIPS
- C. WPA2
- D. SNMP
Answer: A
NEW QUESTION # 76
Option 43 must be configured to allow access points to locate controller. In what network service should this option be configured?
- A. LDAP
- B. RADIUS
- C. DHCP
- D. DNS
Answer: C
NEW QUESTION # 77
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. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.
- B. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.
- C. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for
802.11 APs - D. The edge Ethernet switches should support Ether-channel to get the best results out of the network.
Answer: B
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 # 78
Which one of the following frequency ranges is not specified for use by IEEE 802.11 radios as of
802.11-2012?
- A. 600-630 MHz
- B. 2.4000-2.4835 MHz
- C. 5.725-5.874 GHz
- D. 5.15-5.25 GHz
Answer: A
NEW QUESTION # 79
You are installing an AP to be used by 27 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?
- A. Channel 6, because it is always best to use this channel
- B. Channel 11, because channels 1 and 6 are in use nearby
- C. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision
- D. Channel 1, because it is best to use the channel with the lowest frequency
Answer: C
Explanation:
Explanation
A 5 GHz channel should be used for this AP because channels 1 and 6 are 2.4 GHz channels and they have no impact on the decision. The 5 GHz frequency band offers more non-overlapping channels than the 2.4 GHz frequency band, which reduces interference and improves performance. The 5 GHz frequency band also supports higher data rates and wider channel bandwidths than the 2.4 GHz frequency band, which increases capacity and throughput. The 5 GHz frequency band also has less interference from other devices and sources than the 2.4 GHz frequency band, which enhances reliability and quality of service. Therefore, it is recommended to use the 5 GHz frequency band for WLANs whenever possible. Channels 1 and 6 are two of the three non-overlapping channels in the 2.4 GHz frequency band (the other one is channel 11). They are used by a neighbor network in this scenario, but they do not affect the channel selection for this AP because they operate in a different frequency band than the 5 GHz frequency band. Channel 6 is not always best to use; it depends on the interference and congestion level in the environment. Channel 1 is not best to use because it has a lower frequency than channel 6; frequency does not determine channel quality or performance. Channel
11 is not best to use because it is also a 2.4 GHz channel and it may interfere with channels 1 and
6. References: CWNA-109 Study Guide, Chapter 4: Antenna Systems and Radio Frequency (RF) Components, page 113
NEW QUESTION # 80
Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-to- point WLAN bridge link?
- A. Operating frequency
- B. Receive antenna gain
- C. MU-MIMO capabilities of the bridges
- D. Transmit power
Answer: C
Explanation:
Explanation
MU-MIMO capabilities of the bridges are not a factor considered when calculating the Link Budget for an outdoor point-to-point WLAN bridge link. The Link Budget is a calculation of the expected signal strength at the receiver based on various factors that affect the RF transmission. Some of these factors are operating frequency, transmit power, receive antenna gain, free space path loss, cable loss, connector loss, and environmental loss. MU-MIMO stands for Multi-User Multiple Input Multiple Output, which is a technology that allows multiple devices to communicate simultaneously using multiple spatial streams. MU-MIMO is not relevant for a point-to-point link, where there are only two devices involved. References: 1, Chapter 2, page
59; 2, Section 2.2
NEW QUESTION # 81
You were previously onsite at XYZ's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.
When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?
- A. Frequency-band hopping analysis to detect improper RF channel implementations.
- B. Application analysis with an active phone call on an VoWiFi handset.
- C. Spectrum analysis to locate and identify RF interference sources.
- D. Protocol analysis to discover channel use on neighboring APs.
Answer: B
Explanation:
Explanation
When performing a post-deployment validation survey for voice over Wi-Fi (VoWiFi), an action that must be performed is Application analysis with an active phone call on a VoWiFi handset. Application analysis is a method of testing the performance of a specific application over the WLAN by measuring parameters such as throughput, latency, jitter, packet loss, MOS score, and R-value. Application analysis with an active phone call on a VoWiFi handset can help to evaluate the quality of service (QoS) and user experience of VoWiFi calls over the WLAN. It can also help to identify any issues or bottlenecks that may affect VoWiFi calls such as interference, roaming delays, or insufficient coverage. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 549; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 519.
NEW QUESTION # 82
In an 802.11n WLAN with a heterogeneous set of associated client devices including 802.11b,
11g, and 11n, what HT protection mode will the BSS use?
- A. Mode 2: 20 MHz protection mode
- B. Mode 0: No protection mode (Greenfield)
- C. Mode 3: Non-HT mixed mode
- D. Mode 1: Nonmember protection mode
Answer: C
NEW QUESTION # 83
In addition to throughput enhancements, what other improvements does a dual-band 802.11ac AP provide when compared with 802.11a/g APs? (Choose 2)
- A. Stronger security with more robust encryption modes.
- B. Introduces "fast transition" roaming protocols for VoWiFi phones
- C. Improves service quality for real-time applications at greater distances
- D. Better link reliability between 802.11a/b/g client devices and 802.11ac APs
- E. Increases in receive sensitivity enhance RTLS location accuracy
Answer: C,D
NEW QUESTION # 84
What statements about the beamwidth of an RF antenna are true?
- A. Vertical beamwidth is displayed (in degree) on the antenna's Azimuth chart.
- B. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.
- C. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.
- D. Horizontal and vertical beamwidth are calculated at the points in which the main lobe decreases power by 3 dB
Answer: D
NEW QUESTION # 85
What statement about 802.3, Clause 33 Power over Ethernet is true?
- A. The lowest voltage drop is achieved when using CAT6 cable instead of Cat5 or CAT5e.
- B. Only midspan PSEs are supported.
- C. When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.
- D. Only endpoint PSEs are supported.
Answer: A
Explanation:
Explanation
https://www.cablinginstall.com/articles/2012/08/cat-6a-vs-cat-5e-poe.html The statement that the lowest voltage drop is achieved when using CAT6 cable instead of Cat5 or CAT5e is true about 802.3, Clause 33 Power over Ethernet. Power over Ethernet (PoE) is a technology that allows electrical power to be delivered over Ethernet cables along with data signals. PoE is defined by IEEE 802.3, Clause 33 and has several variants, such as PoE (802.3af), PoE+ (802.3at), and PoE++ (802.3bt). PoE works by using a device called PSE (Power Sourcing Equipment) that injects power into the Ethernet cable and a device called PD (Powered Device) that receives power from the Ethernet cable. The PSE can be either an endpoint device, such as a switch or a router, or a midspan device, such as an injector or a splitter, that is inserted between two Ethernet devices. The PD can be any device that requires power, such as an access point, a camera, or a phone.
One of the factors that affects PoE performance is voltage drop, which is the reduction of voltage that occurs as current flows through a cable due to its resistance. Voltage drop can cause power loss and inefficiency in PoE systems, as well as damage to PDs if the voltage falls below their minimum requirement. To minimize voltage drop, it is recommended to use high-quality cables with low resistance and short length. Among the common types of Ethernet cables, CAT6 has the lowest resistance and therefore the lowest voltage drop compared to Cat5 or CAT5e. CAT6 also has higher bandwidth and data rate than Cat5 or CAT5e, making it more suitable for PoE applications. References: 1, Chapter 7, page 263; 2, Section 4.4
NEW QUESTION # 86
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?
- A. NTP
- B. DHCP
- C. GRE
- D. SNMP
Answer: B
NEW QUESTION # 87
What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?
- A. CCMP
- B. AES
- C. Shared Key Authentication
- D. Open System Authentication
Answer: C
NEW QUESTION # 88
You are troubleshooting a client issue on a Windows laptop. The laptop can see and connect to
2.4 GHz APs, but it does not even see 5 GHz APs. While evaluating the issue, you determine that this problem is happening for all of the laptops of this model in the organization. Several other tablets connect on channel 48 and channel 52 in the same work areas. What is the likely problem?
- A. The clients are configured to use WPA and 5 GHz channels only support WPA2
- B. The access points are configured to disallow 5 GHz
- C. The client drivers are faulty and should be upgraded
- D. The antennas in the laptops have insufficient gain to detect the 5 GHz signals
Answer: D
NEW QUESTION # 89
A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss.
If the cable is connected to an antenna with 9 dBi gain, what is the EIRP at the antenna element?
- A. 10 dBm
- B. 13 dBm
- C. 23 dBm
- D. 26 dBm
Answer: C
NEW QUESTION # 90
You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your
2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIds, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?
- A. Interference from non-Wi-Fi sources
- B. Interference from other WLANs
- C. DoS attack
- D. Faulty drivers
Answer: D
Explanation:
Explanation
The likely problem that causes this scenario is faulty drivers. Drivers are software components that enable the communication between the operating system and the hardware devices, such as the wireless adapters. Faulty drivers can cause various issues with the wireless connectivity, such as not detecting or connecting to certain networks, dropping connections, or reducing performance. Faulty drivers can be caused by corrupted files, outdated versions, incompatible settings, or hardware defects. To fix faulty drivers, you can try to update, reinstall, or roll back the drivers, or contact the manufacturer for support. Interference from non-Wi-Fi sources, DoS attack, or interference from other WLANs are not likely to cause this scenario, as they would affect all devices in the same area, not just the new laptops. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 562; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 532.
NEW QUESTION # 91
In a Wi-Fi client configuration utility, what feature is most likely to be user configurable?
- A. SNMPv3 Users
- B. 802.1p to WMM mappings
- C. EAP Authentication Type
- D. RADIUS Server IP Address
- E. WMM-PS Dozing Interval
Answer: C
NEW QUESTION # 92
You are being interviewed by ABC Company for employment as a wireless site survey expert.
The interviewing manager asks you what items should be included in a site survey report generated as part of a manual site survey process.
What answer would be accurate?
- A. RF heat map illustrating coverage and signal quality for each frequency band
- B. Documentation noting how each WLAN user group will authenticate to the network
- C. Documentation proving proper entry of wall material types into the site survey software
- D. Itemized list of equipment, licenses, and support contracts required for the facility
Answer: A
NEW QUESTION # 93
You have been tasked with creating a wireless link between two buildings on a single campus.
The link must support at least 150 Mbps data rates.
What kind of WLAN technology role should you deploy?
- A. WPAN
- B. Access BSS
- C. IBSS
- D. Wireless bridging
Answer: C
NEW QUESTION # 94
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