CWNA Exam 3

1. Which of the following are true about frequency?
2. Amplitude can also be controlled by varying the strength of the signals, meaning higher the output power, the higher the amplitude of the wave
3. Which of the following statements are true about phase?
4. Two waves that are completely out of phase would be 180 degrees out of phase and when the waves are out of phase, they strengthen each other
5. In which of the following RF signal behaviours, wireless signals bounce off certain surface types and depending on the surface the degree of bounce will vary?
6. Which of the following can cause RF loss?
7. What can be done to minimize the voltage standing wave ratio?
8. Which of the following components will always be the reason for the greatest amount of loss of signal?
9. Which of the following statements are true about the received signal strength indicator?
10. If your access point is configured to transmit at 50 mW and is attached to a cable that introduced 3 dB of loss, what would be the amount of absolute amplitude at the end of the cable?
11. The radius of the second Fresnel zone is larger than the radius of the first Fresnel zone
12. Match the antenna diversity type with the correct description
Switched diversity
Multiple copies of the same signal are transmitted through the multiple antennas

Unselect

Multiple received signals are combined together to increase the signal amplitude

Unselect

Multiple copies of the same signal arrive at the receiver antennas with different amplitudes

Unselect

Received diversity
Multiple copies of the same signal are transmitted through the multiple antennas

Unselect

Multiple received signals are combined together to increase the signal amplitude

Unselect

Multiple copies of the same signal arrive at the receiver antennas with different amplitudes

Unselect

Transmit diversity
Multiple copies of the same signal are transmitted through the multiple antennas

Unselect

Multiple received signals are combined together to increase the signal amplitude

Unselect

Multiple copies of the same signal arrive at the receiver antennas with different amplitudes

Unselect

13. Which of the following is performed by transmitting multiple phase-shifted signals with the intention that they will arrive in-phase at receiver end?
14. Which of the following are types of highly directional antennas?
15. Which of the following is an international standards organization for the Internet and manages the creation of Internet standards through a standards process?
16. Which of the following standards can operate in both 2.4 GHz and 5 GHz bands?
17. OFDM was originally specified in the primary 802.11 standard and is one of the most popular modulation and transmission methods in the wireless communications
18. What benefits direct sequence spread spectrum provide?
19. Which of the following statements are true about Orthogonal frequency-division multiple access (OFDMA)?
20. BPSK is a digital modulation process, which transmits data by changing the phase of a constant frequency of the carrier wave
21. Which layer of the OSI model deals with network addresses like IP addresses for IPv4 or IPv6?
22. Which of the following statements are true about very high throughput?
23. Wireless bridging is the connection of two networks using a wireless AP as a bridge or a dedicated 802.11 wireless bridge device
24. In Infrastructure BSS, what is used as a central point of communication?
25. Which of the following statements are true related to SSID?
26. Which of the following is a MAC address of an access point radio provided by the hardware manufacturer?
27. The purpose behind an extended service set with overlapping coverage cells is to provide seamless roaming to the client stations
28. Which of the following provides communication between stations in the same BSS?
29. Match the 802.11 MAC and PHY terminologies with the correct descriptions
MSDU
It consists of MAC header, frame body and FCS or frame check sequence field

Unselect

It modulates the data bits and begin transmitting the frames

Unselect

Its purpose is to prepare the frame for transmission by taking the frame from upper sub layer

Unselect

It is the data payload that contains the IP packet plus some logical link layer data

Unselect

MPDU
It consists of MAC header, frame body and FCS or frame check sequence field

Unselect

It modulates the data bits and begin transmitting the frames

Unselect

Its purpose is to prepare the frame for transmission by taking the frame from upper sub layer

Unselect

It is the data payload that contains the IP packet plus some logical link layer data

Unselect

PLCP
It consists of MAC header, frame body and FCS or frame check sequence field

Unselect

It modulates the data bits and begin transmitting the frames

Unselect

Its purpose is to prepare the frame for transmission by taking the frame from upper sub layer

Unselect

It is the data payload that contains the IP packet plus some logical link layer data

Unselect

PMD
It consists of MAC header, frame body and FCS or frame check sequence field

Unselect

It modulates the data bits and begin transmitting the frames

Unselect

Its purpose is to prepare the frame for transmission by taking the frame from upper sub layer

Unselect

It is the data payload that contains the IP packet plus some logical link layer data

Unselect

30. Which type of frame is used by wireless stations to join and leave the basic service set?
31. Locating and connecting to an open wireless LAN involves which of the following steps?
32. Which authentication type uses wired equivalent privacy or WEP to authenticate client stations and requires that a static WEP key be configured on both the station and the access point?
33. WPA and WPA2-Enterprise utilize which type of authentication?
34. At which layer roaming occurs, when SSIDs are implemented with the same name in both 2.4 GHz and 5 GHz?
35. When the Power Management bit is set to 0, an access point is informed that the client station is using power management, and it buffers all of that client’s 802.11 frames
36. What are some of the common names for autonomous access points?
37. In distributed data forwarding, wireless LAN controller takes part in which of the following?
38. What is used to create separate broadcast domains in a Layer 2 network and are often used to limit access to network resources?
39. For the purpose of authenticating connected systems, which two ports are defined by the 802.1X standard?
40. Fast secure roaming is implemented using which of the following techniques?
41. In a wireless intrusion prevention system, which three basic detection methods are used?
42. Which of the following protocols is used to send secure data between a browser and a website?
43. Which of the following is a measurement of the percentage of the time something is transmitting on a frequency?
44. RF interference from a non-802.11 transmitter does not cause layer 2 retransmissions
45. Which of the following tools can be used to verify basic network connectivity?
46. When users complain that the performance of the WLAN has been degraded in a certain area and you have determined that there is no more network utilization than normal, it is likely that a new source of interference has been introduced in the user's area. Which of the following device can be used to detect this interference?
47. Which of the following can cause layer 2 retransmissions?
48. Adjacent channel interference causes a severe degradation in latency, jitter, and throughput
49. Which of the following methods can be used to extend the range of an access point?
50. Why the 2.4 GHz frequency band is not the best choice for high-density deployments?

 

Leave a comment