CWNA Exam 2

1. Which of the following is not a characteristic of a single RF wave?
2. When two waves are perfectly in phase, the signal amplitude will be decreased
3. Which of the following gain type is accomplished by focusing the RF signal with the use of an antenna?
4. Which of the following is the loss of the signal strength caused by the natural expansion of the waves?

 
5. Match the units of RF measurement with respective descriptions
dBi
measurement of the difference between two power levels

Unselect

represents a measurement of power gain used for RF antennas

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represents an absolute measurement of power relative to one milliwatt

Unselect

represents the basic unit of power

Unselect

dBm
measurement of the difference between two power levels

Unselect

represents a measurement of power gain used for RF antennas

Unselect

represents an absolute measurement of power relative to one milliwatt

Unselect

represents the basic unit of power

Unselect

dB
measurement of the difference between two power levels

Unselect

represents a measurement of power gain used for RF antennas

Unselect

represents an absolute measurement of power relative to one milliwatt

Unselect

represents the basic unit of power

Unselect

W
measurement of the difference between two power levels

Unselect

represents a measurement of power gain used for RF antennas

Unselect

represents an absolute measurement of power relative to one milliwatt

Unselect

represents the basic unit of power

Unselect

6. SNR is defined as the difference between which of the following?
7. Which of the following is a relative value of the strength and quality of an RF signal being received by the antenna?
8. Rule of 10s and 3s states that for every 10 dB of gain, multiply the absolute power by a factor of 10
9. Which of the following is the highest RF signal strength that is transmitted from a particular antenna?
10.
The frequency of 2.4 million cycles per second is  represented by 2.4 GHz

11. What is the purpose of a lightning arrestor?
12. What are some of the advantages of using highly-directional antennas?
13. What type of chart is shown below?

 
14. Which of the following IEEE standard specifies a port-based authentication solution?
15. What is indicated when a device is certified by the Wi-Fi Alliance as 802.11a/b/g/n certified?
16. Which of the following was specified in the 802.11b standard and provides 5.5 and 11 Mbps RF communication?
17. In which of the following multiplexing technology, sub-channels are closely spaced and overlapped, thereby allowing more data transmissions?
18. Which of the following are different types of modulation techniques?
19. 16-QAM includes 16 data points, representing 4 bits, while 64-QAM includes 64 data points, representing 6 bits
20. Which of the following is the process of taking two adjacent channels using different frequencies and combining them?
21. Which of the following OSI layer uses mechanisms to ensure end to end delivery between a sending and a receiving host on a network?
22. Which of the following network types does not include an access point and client communicates directly with each other?
23. Roaming occurs at which of the following layers?
24. Which of the following are the features of the wireless LAN controller?
25. What is used by access points to clear the channel as a protection mechanism, and is also used by client STAs?
26. Which of the following device is used to add power to an ethernet segment, without replacing existing switches?
27. In centralized data forwarding model, all data is forwarded from the access point to the WLAN controller for the processing
28. In most of the Guest Wi-Fi networks, guest users are allowed to log in through which of the following?
29. What are some of the disadvantages of using BYOD policy in a company?
30. What are some of the advantages of using airtime fairness?
31. Which of the following can be used to force a client to connect to the 5 GHz band?
32. Which of the following can be used for automatic channel assignment and output power level management?
33. In which of the following wireless network security standards, a push-button feature is used to connect Wi-Fi enabled devices to a secure wireless network?
34. What evaluates the capability or state of a computer to determine the potential risk of the computer on the network and to determine the level of access to allow?
35. What can be used to manage mobile devices in a centralized structured way?
36. Which of the following needs to be implemented, if 802.1X/EAP security and time-sensitive applications are used together in a wireless network?
37. A typical wireless intrusion prevention system consists of which of the following primary components?
38. Which of the following is a frequency domain instrument that can measure the amplitude and frequency space of electromagnetic signals?
39. What can be used to pull information from devices as well as to identify the connected devices that are on a network and can be used to monitor the overall network conditions and performance?
40. Which one of the following frame types are protected by management frame protection?
41. Which of the following implements an encrypted connection between two endpoints over the Internet so that sensitive data can be transmitted securely?
42. A 5 GHz channel reuse plan of eight or more 20 MHz channels will greatly decrease which of the following?
43. What is the maximum roaming handoff in milliseconds for most of voice over Wi-Fi implementations?
44. Which of the following are throughput testing tools to evaluate bandwidth and performance in wireless LAN?
45. Co-channel interference does not cause retransmissions but does add unnecessary medium contention overhead
46. What can be done to fix the hidden node problems?
47. Which of the following possible solutions can be used when attempting to resolve throughput or capacity issues?
48. In most cases, what is the root cause of random rebooting of access points?
49. When it comes to 5 GHz, frequencies for each of 5 GHz channels don't overlap with each other. So, this is why the 5 GHz channels are less susceptible to interference
50. A very common problem for WLANs is that the client successfully associates with the AP but can’t acquire an IP address. What could be the possible reasons?

 

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