2024 Provide Updated CWNP CWNA-108 Dumps as Practice Test and PDF
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CWNP CWNA-108 Exam is a comprehensive exam that covers a wide range of topics related to wireless networking. It tests the candidate's understanding of wireless LAN design, installation, and troubleshooting, as well as their knowledge of wireless security, RF fundamentals, and network analysis. CWNA-108 exam is designed to validate the candidate's skills and knowledge in wireless networking and to provide them with a globally recognized certification that can help advance their career.
The CWNA-108 certification is highly respected in the IT industry and is recognized by leading wireless networking vendors such as Cisco, Aruba, and Ruckus. It is a vendor-neutral certification that provides a comprehensive understanding of wireless networking technologies and prepares IT professionals for a career in wireless network administration. The CWNA-108 exam is a challenging exam that requires extensive preparation and knowledge of wireless networking technologies. However, passing the exam is a great achievement that can lead to a variety of career opportunities and professional growth.
NEW QUESTION # 50
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. DMG
- C. DSSS
- D. TVHT
Answer: D
Explanation:
Explanation
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.
NEW QUESTION # 51
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. CCI
- B. Bluetooth interference
- C. Non-Wi-Fi interference
- D. ACI
Answer: D
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 # 52
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 for voice over Wi-Fi. what is an action that must be performed?
- A. Application analysis with an active phone call on a VoWiFi handset
- B. Spectrum analysis to locate and identity RF Interference sources
- C. Protocol analysis to discover channel use on neighboring APs
- D. Frequency-band hopping analysis to detect improper RF channel implementations
Answer: B
NEW QUESTION # 53
What is a common feature of an 802.11 WLAN client utility? (Choose 2)
- A. Link statistics display
- B. Real-time retry monitor
- C. AP Signal strength meter
- D. Spectrum analyzer utility
- E. VLAN configuration
Answer: A,C
NEW QUESTION # 54
What is appended to the end of each 802.11 data frame after the payload?
- A. Preamble
- B. FCS
- C. MAC header
- D. PHY header
Answer: B
NEW QUESTION # 55
A non-802.11 device is suspected of causing interference on the WLAN. You are not certain of the location or type of device. What is the best solution for locating this non-802.11 device?
- A. Laptop-based spectrum analyzer with an omni-directional antenna
- B. Laptop-based spectrum analyzer with an omni-directional antenna
- C. Laptop-based spectrum analyzer with a directional antenna
- D. Access point spectrum analyzer
Answer: C
Explanation:
Explanation
A laptop-based spectrum analyzer with a directional antenna is the best solution for locating a non-802.11 device that is suspected of causing interference on the WLAN. A spectrum analyzer is a device or a software application that can measure and display the frequency spectrum of electromagnetic signals in a given range.
A spectrum analyzer can show the amplitude, frequency, bandwidth, modulation, and other characteristics of different signals in the spectrum, which can help identify their sources and types. A spectrum analyzer can also detect non-802.11 devices that may cause interference on the WLAN, such as microwave ovens, cordless phones, Bluetooth devices, or radar systems. A laptop-based spectrum analyzer is a software application that runs on a laptop computer and uses an external USB adapter as its RF interface. A laptop-based spectrum analyzer has the advantage of being portable, flexible, and cost-effective compared to a hardware-based spectrum analyzer. A directional antenna is an antenna that radiates or receives RF signals more strongly in one direction than in others. A directional antenna has a high gain and a narrow beamwidth, which means it can focus the RF energy in a specific direction and reduce the interference from other directions. A directional antenna can also increase the range and sensitivity of the RF signal detection. To locate a non-802.11 device that is causing interference on the WLAN, a laptop-based spectrum analyzer with a directional antenna can be used to perform a technique called RF hunting or triangulation. This technique involves pointing the directional antenna in different directions and observing the signal strength and characteristics of the interfering device on the spectrum analyzer. By moving around and changing the direction of the antenna, the location of the interfering device can be estimated based on where the signal strength is highest and most consistent. References: 1, Chapter 7, page 282; 2, Section 4.3
NEW QUESTION # 56
You administer a WLAN that offers a guest SSID of GUESTNWORK. User connect to the GUESTNWORK SSID, but report that they cannot browse the internet. The devices simply report no internet connection. What common problem causes this scenario?
- A. NTP issues
- B. Hardware issues
- C. IP routing issues
- D. Captive portal issues
Answer: C
NEW QUESTION # 57
A dual-band 802-1 lac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A. 12.95 W
- B. 30 W
- C. 25. 5W
- D. 15.4 W
Answer: C
Explanation:
Similar to a PoE network switch, the PoE plus switch also supplies power over two pairs, but it adds an additional power class that is able to deliver power up to 25.5W for a PD with a voltage range from
42.5V to 57V. The max power delivered by each port of a PoE+ switch is 30W, along with a voltage range from 50V to 57V.
https://community.fs.com/blog/poe-switch-types.html
https://en.wikipedia.org/wiki/Power_over_Ethernet#:~:text=Class%204%20can%20only%20be%2
0used%20by%20IEEE,0%20device.%20Configuration%20via%20Ethernet%20layer%202%20LL DP
NEW QUESTION # 58
What wireless networking term describe the increase of RF energy in an intentional direction with the use of an antenna?
- A. Passive Gain
- B. Active Amplification
- C. Beam Digression
- D. Directed Radiation
Answer: A
NEW QUESTION # 59
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 was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- C. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- D. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Answer: A
NEW QUESTION # 60
In which plane of the three networking planes is an access point configured by a WLAN controller?
- A. Security
- B. Management
- C. Control
- D. Data
Answer: B
Explanation:
Explanation
An access point is configured by a WLAN controller in the management plane of the three networking planes.
The management plane is responsible for the configuration, administration, and monitoring of network devices, such as access points, switches, routers, and controllers. The WLAN controller communicates with the access point using a management protocol, such as CAPWAP or SNMP, to send configuration commands and receive status information. The control plane is responsible for the routing, switching, and forwarding of network traffic, such as data frames and control frames. The WLAN controller may also participate in the control plane by performing functions such as authentication, encryption, roaming, and load balancing. The security plane is responsible for the protection of network devices and data from unauthorized access, modification, or disclosure. The WLAN controller may also participate in the security plane by implementing features such as firewall, VPN, IDS/IPS, and WIPS. The data plane is responsible for the transmission and reception of user data, such as voice, video, or web traffic. The WLAN controller may or may not participate in the data plane depending on the architecture of the WLAN. In some cases, the access point forwards the user data directly to the wired network without involving the WLAN controller (distributed data forwarding).
In other cases, the access point tunnels the user data to the WLAN controller before forwarding it to the wired network (centralized data forwarding). References: CWNA-109 Study Guide, Chapter 9: Wireless LAN Architecture, page 279
NEW QUESTION # 61
You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?
- A. Band steering
- B. FT
- C. Load balancing
- D. OKC
Answer: B
Explanation:
Explanation
FT (Fast Transition) is an IEEE 802.11 standard method for fast roaming. FT is defined in the IEEE 802.11r amendment and is also known as Fast BSS Transition (FBT) or Fast Secure Roaming. FT is a feature that allows a client station to quickly switch from one AP to another within the same ESS (Extended Service Set) without having to re-authenticate and re-associate with each AP. This reduces the latency and packet loss that may occur during roaming, thus improving the user experience and maintaining the security of the connection.
FT works by using pre-authentication and key caching mechanisms that allow the client station and the APs to exchange security information before the actual roaming occurs. This way, when the client station decides to roam to a new AP, it can use a fast reassociation request and response that contain only a few fields, instead of a full authentication and association exchange that require more time and data. References: 1, Chapter 9, page
367; 2, Section 6.3
NEW QUESTION # 62
An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?
- A. BSS
- B. Ad-hoc
- C. WPAN
- D. IBSS
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 63
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. Lack of support for 802.11n
- B. Too few spatial streams
- C. CAT5e cabling run to the AP
- D. Weak signal strength
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION # 64
In an 802.11n (H T) 2.4 GHz BSS, what prevents each station from using all the airtime when other client stations are actively communicating in the same BSS?
- A. CSMA/CD
- B. CSMA/CA
- C. 802.11 DOS prevention
- D. OFDMA
Answer: B
Explanation:
Explanation
What prevents each station from using all the airtime when other client stations are actively communicating in the same BSS is CSMA/CA. CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance and is a media access control method used by WLAN devices to share the wireless medium. CSMA/CA works by having each station sense the medium before transmitting a frame. If the medium is busy (i.e., another station is transmitting), the station defers its transmission until the medium is idle. If the medium is idle, the station waits for a random backoff period before transmitting. This way, CSMA/CA reduces the chances of collisions and ensures fair access to the medium for all stations. CSMA/CA also uses positive acknowledgements to confirm successful transmissions and retransmissions to recover from errors.
CSMA/CD, DOS prevention, and OFDMA are not used by WLAN devices in a BSS. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 108; [CWNA:
Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 98.
NEW QUESTION # 65
When an ACK frame is not received by the transmitting STA, what is assumed?
- A. The frame was not delivered and must be retransmitted
- B. The receiver is offline
- C. The frame was correctly delivered
- D. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
Answer: A
NEW QUESTION # 66
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
- A. 10 ms
- B. 400 ns
- C. 104 ms
- D. 800 ns
Answer: B
Explanation:
Explanation
The short guard interval is an optional feature of 802.11n and 802.11ac that reduces the time between OFDM symbols from 800 ns to 400 ns. This can increase the data rate by about 11%, but also requires more precise timing and synchronization between the transmitter and the receiver. The short guard interval is only used when both the AP and the client support it and agree to use it . References: [CWNA-109 Study Guide], Chapter 4: Radio Frequency Signal and Antenna Concepts, page 163; [CWNA-108 Study Guide], Chapter 4:
Radio Frequency Signal and Antenna Concepts, page 157.
NEW QUESTION # 67
Your consulting firm has recently been hired to complete a site survey for a company. Your engineers use predictive modeling software for surveying, but the company insists on a pre- deployment site visit.
What task should be performed as part of the pre-deployment visit to prepare for a predictive survey?
- A. Install at least one AP on each side of the exterior walls to test for co-channel interference through these walls.
- B. Evaluatethe building materials at ABC's facility and confirm that the floor plan documents are consistent with the actual building.
- C. Test several antenna types connected to the intended APs for use in the eventual deployment.
- D. Collect information about the company's security requirements and the current configuration of their RADIUS and user database servers.
Answer: B
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. The edge Ethernet switches should support Ether-channel to get the best results out of the network.
- B. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for
802.11 APs - C. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.
- 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
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: B
NEW QUESTION # 70
When using an RF splitter to connect one transceiver to sector antennas loss is incurred. What is this loss called?
- A. Active loss
- B. Through loss
- C. Conversion loss
- D. Intentional loss
Answer: B
NEW QUESTION # 71
You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?
- A. Band steering
- B. FT
- C. Load balancing
- D. OKC
Answer: B
NEW QUESTION # 72
What statement about the IEEE 802.11-2016 QoS facility is true?
- A. Four 802.1p user priorities are mapped to eight 802.11 transmit queues.
- B. When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.
- C. 802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.
- D. 802.11 control frames are assigned to the 802.11 EF priority queue.
Answer: C
Explanation:
Explanation
802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention. 802.11 QoS is based on the Enhanced Distributed Channel Access (EDCA) mechanism, which defines four access categories (ACs) for different types of traffic: Voice, Video, Best Effort, and Background. Each AC has its own transmit queue and contention parameters, such as Arbitration Interframe Space (AIFS), Contention Window (CW), and Transmission Opportunity (TXOP). These parameters determine how long a station has to wait before transmitting a frame and how long it can occupy the channel. Higher priority ACs have shorter AIFS, smaller CW, and longer TXOP, which means they have more chances to access the channel and send more data than lower priority ACs. However, this does not guarantee that higher priority ACs will always win the contention, as there is still a random backoff process involved. Therefore, 802.11 QoS is a statistical service that provides different levels of service quality based on traffic categories. References: , Chapter 10, page 403; , Section 6.1
NEW QUESTION # 73
Option 43 must be configured to allow access points to locate controllers. In what network service should this option be configured?
- A. DNS
- B. RADIUS
- C. DHCP
- D. LDAP
Answer: C
NEW QUESTION # 74
......
Understanding functional and technical aspects of CWNA® - Certified Wireless Network Administrator Business Principles and Practices
The following will be discussed in CWNP CWNA-108 exam dumps:
- Open System Authentication and Shared Key authentication
- Dynamic power and channel management features
- Capacity planning for high and very high-density environments
- EDCA
- Wireless network management systems
- Design considerations for guest access/BYOD
- Describe features of, select, and install WLAN devices, control, and management systems
- Design considerations for voice
- Basic Service Set (BSS) (Infrastructure mode)
- Distribution System Media (DSM)
- CTS-to-Self
- Time synchronization protocols (e.g. NTP, SNTP)
- Define terminology related to the 802.11 MAC and PHY
- DNS for address resolution for clients and APs
- Extended Service Set (ESS)
- Design considerations for highly mobile devices (e.g. tablets and smartphones)
- Connecting to hidden SSIDs
- Physical carrier sense and virtual carrier sense
- Identify and explain the purpose of the three main 802.11 frame types
- SSID
- Stations (STAs)
- Power save modes and frame buffering
- Design considerations for supporting legacy 802.11 devices
- MAC addressing
- Identify and explain the MAC frame format
- MAC frame format
- Band steering
- Scanning (active and passive)
- Roaming
- VLANs for segmentation
- Wired network capacity requirements
- DCF
- Hidden node
- Client devices
- DHCP for client addressing, AP addressing and/or controller discovery
- WLAN controllers
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