[Dec-2021] Pass CWNA-108 Exam in First Attempt UpdatedCWNA-108 VCEEngine Exam Question
CWNA Certification Dumps CWNA-108 Exam for Full Questions - Exam Study Guide
NEW QUESTION 95
An RF signal sometimes bends as it passes through some material other than free space.
What is the term that describe this behavior?
- A. Scattering
- B. Warping
- C. Refraction
- D. Reflection
Answer: C
NEW QUESTION 96
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
- A. 1 and 5
- B. 7 and 11
- C. 2 and 8
- D. 4 and 6
Answer: D
NEW QUESTION 97
What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?
- A. Implementing Fast BSS Transition (FT) for roaming
- B. Increasing or decreasing the number of spatial streams in use by the client station and AP
- C. Implementation of several other clients in the same BSS using 802.11g radios
- D. RF interference from more than 10 nearby Bluetooth transmitters
Answer: A
NEW QUESTION 98
What factor does not influence the distance at which an RF signal can be effectively received?
- A. Receiving station's output power
- B. Transmitting station's output power
- C. Free Space Path Loss
- D. Receiving station's radio sensitivity
Answer: D
NEW QUESTION 99
What phrase defines Equivalent Isotropically Radiated Power (EIRP)?
- A. Power supplied from the transmission line to the antenna input
- B. The power output from the radio after cable losses
- C. Reflected power due to an impedance mismatch in the signal path
- D. The highest RF signal strength that is transmitted from a given antenna
- E. The power output from the radio into the RF cable
Answer: D
NEW QUESTION 100
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. SNMP
- D. GRE
Answer: B
NEW QUESTION 101
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 102
When performing a validation survey for a Multiple Channel Architecture (MCA) system in a multi- tenant building with five floors, what aspect should you, as the surveyor, keep in mind?
- A. The RF interference caused by passing airplanes supporting on-board Wi-Fi should be a prime consideration
- B. The omni-directional antennas of the access points should be oriented parallel to the floor to maximize the coverage pattern across as many floors as possible
- C. The Fresnel Zone is completely blocked between floors so each floor is considered a separate site survey
- D. The channel reuse pattern should be three dimensional with the RF cell extending coverage of each access point to other floors
Answer: D
NEW QUESTION 103
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. RTLS
- B. E-Mail
- C. VoIP
- D. FTP
Answer: C
NEW QUESTION 104
What standard is referenced into the 802.11-2012 specification and is recommend for robust WLAN client security?
- A. SSID hiding
- B. 802.1X/EAP
- C. WEP
- D. IPSec VPN
Answer: B
NEW QUESTION 105
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 data throughput rate will increase because VSWR will decrease.
- C. The Equivalent Isotropically Radiated Power (EIRP) will decrease.
- D. The size of the Fresnel zone will increase.
- E. The antenna's azimuth beamwidth will decrease.
Answer: C
NEW QUESTION 106
An IEEE 802.11 amendment is in the draft state. What impact does this draft amendment have on the 802.11 standard?
- A. No impact: Until an amendment is ratified, it does not become part of the standard.
- B. No impact: Draft amendments do not become part of the standard until a working group is formed.
- C. Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
- D. The standard is changed to reflect the new capabilities as soon as amendment enters the draft stage.
Answer: A
NEW QUESTION 107
You are configuring an access point to use channel 128. What important fact should be considered about this channels?
- A. It is a 22 MHz channel so it will overlap with the channels above and below it
- B. It is a 2.4 GHz frequency band 40 MHz channel, so it should not be used
- C. It is a channel that is unsupported by most access points
- D. It is a channel that likely requires DFS when used
Answer: D
NEW QUESTION 108
What are two channel modes specified by the 802.11n (High Throughput) PHY? (Choose 2)
- A. 80 MHz
- B. 40/80 MHz
- C. 20 MHz
- D. 22 MHz
- E. 20/40 MHz
- F. 160 MHz
Answer: C,E
NEW QUESTION 109
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?
- A. The external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use
- B. The laptop has a failing wireless adapter
- C. The AP is overloaded during the work day
- D. The drivers in the laptop are corrupt
Answer: A
NEW QUESTION 110
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
- A. VHT (802.11ac)
- B. HT (802.11n)
- C. OFDM (802.11a)
- D. DSSS (802.11-Prime)
Answer: B
NEW QUESTION 111
You are attempting to explain RF shadow and how it can cause lack of coverage. What common building item frequently causes RF shadow and must be accounted for in coverage plans?
- A. Cubicle partitions
- B. Wooden doors
- C. Carpeted floors
- D. Elevators
Answer: A
NEW QUESTION 112
When a STA has authenticated to an AP (AP-1), but still maintains a connection with another AP (AP-2), what is the state of the STA on AP-1?
- A. Authenticated and Associated
- B. Transitional
- C. Authenticated and Unassociated
- D. Unauthenticated and Unassociated
Answer: B
NEW QUESTION 113
You are troubleshooting an issue reported by several wireless users. The problem is contained to one cell (several users connected to the same AP). You manage the WLAN and no other network devices. After analysis it appears to be a switch problem. What action should be taken?
- A. Escalate the problem to the wireless vendor support staff
- B. Document the results and close the case
- C. Escalate the problem to the network administration team
- D. Create a plan of action and implement it
Answer: C
NEW QUESTION 114
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