CWNP CWNP Certification CWNA-108 Questions & Answers

• Question 1:

  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. Faulty drivers

  C. DoS attack

  D. Interference from other WLANs

  Correct Answer: D

• Question 2:

  What Linux shell command can be used to view the hardware and PHY capabilities of a wireless adapter in detail including channel widths, output power setting, channels supported, and more?

  A. ifconflg

  B. iw phy

  C. netsh wlan show device

  D. iwconflg

  Correct Answer: D

• Question 3:

  When antenna gain is reported in dBi, the gain of the antenna is compared to what theoretical radiator?

  A. End-fire radiator

  B. Dipole radiator

  C. Isotropic radiator

  D. Anthropomorphic radiator

  Correct Answer: C

  An isotropic radiator is a theoretical point source of electromagnetic radiation that radiates equally in all directions. It has no physical dimensions and no preferred direction of radiation. It is used as a reference for antenna gain because it represents the ideal case of a perfect omnidirectional antenna12 Antenna gain is a measure of how well an antenna concentrates its radiated power in a certain direction. It is expressed in decibels (dB) relative to a reference antenna. When the reference antenna is an isotropic radiator, the antenna gain is denoted by dBi, which stands for decibels relative to isotropic12 For example, an antenna with a gain of 3 dBi means that it radiates 3 dB more power in its main direction than an isotropic radiator would. Conversely, an antenna with a gain of -3 dBi means that it radiates 3 dB less power in its main direction than an isotropic radiator would12

• Question 4:

  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. 153

  B. 161

  C. 144

  D. 56

  Correct Answer: C

• Question 5:

  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. Transitional

  B. Unauthenticated and Unassociated

  C. Authenticated and Unassociated

  D. Authenticated and Associated

  Correct Answer: A

  https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/Enterprise-Mobility-8-1-Design-Guide/ Enterprise_Mobility_8-1_Deployment_Guide/Chapter-11.pdf

• Question 6:

  The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?

  A. 2.413

  B. 2.427

  C. 2.422

  D. 2.417

  Correct Answer: B

• Question 7:

  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. Passive Gain

  D. Beam Digression

  Correct Answer: C

  Reference https://books.google.com.pk/books?id=saC_2j-IwwICandpg=PA51andlpg=PA51anddq=passive+gain+increase +of+RF+energy+in+an+intentional+direction+with+the+use+of+an +antennaandsource=blandots=ePmfHdkUksandsig=TzpBqUuomGckVXy6kPAO8t2l_Jcandhl=enandsa=Xandved=0ahU KEwjwtb6Ds57ZAhUBesAKHfpCCSAQ6AEIKjAB#v=onepageandq=passive%20gain%20increase%20of% 20RF%20energy%20in% 20an %20intentional%20direction%20with%20the%20use%20of%20an% 20antennaandf=false

• Question 8:

  What fact is true regarding controllers and Aps in a split-MAC architecture?

  A. Using centralized data forwarding, frames leaving the Aps are never tagged Ethernet frames with VLAN identifiers

  B. An IP tunnel is established between the AP and controller for AP management and control functions

  C. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator

  D. Management and data frames must be processed locally by the AP, while control frames are sent to the controller

  Correct Answer: B

• Question 9:

  What ID is typically mapped to an AP's MAC address if a single BSS is implemented?

  A. VLAN ID

  B. BSSID

  C. Device ID

  D. SSID

  Correct Answer: B

  Reference https://technet.microsoft.com/en-us/library/cc757419(v=ws.10).aspx

• Question 10:

  You are troubleshooting a WLAN problem and you suspect hidden node as the cause. What should you look for in a protocol analyzer?

  A. Frames with the HN bit set to 1

  B. Frames with the retry bit set to 0

  C. Frames transmitted from the AP without acknowledgement

  D. Retransmitted frames from multiple STAs at higher rates than other STAs

  Correct Answer: D

  Reference http://setup-wireless.blogspot.com/2008/11/wireless-hidden-node.html