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Exam 1: Certified Wireless Network Administrator (CWNA)

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Question 21

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You are to increase the capacity of an existing wireless LAN that works on FHSS technology. You want FHSS to be replaced with the DSSS technology to achieve the objective. Which of the following statements could justify your judgment?

A) FHSS devices will cost less and have greater throughput.
B) DSSS devices will cost more, but have greater throughput.
C) New FHSS devices placed in the system may not be compatible with the older devices.
D) DSSS is more secure than FHSS.

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Question 22

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You must provide the best coverage possible for users inside an office. The office is free from tall obstructions such as shelving, but has a high ceiling. You have decided to use a low-gain Omni-directional antenna to achieve your goal. Where should you install the antenna for best coverage?

A) In the center of the building on the roof.
B) In the center of the building on the ceiling.
C) In one of the corners of the building.
D) On one of the walls of the building.

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Question 23

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Which of the following statements is true if an RF signal is considered as a spread spectrum?

In a network setup a set of access points are connected to the wired segment. Your key objective is to extend the range of the access points to clients who are outside the range of the access points in the wired segment. So you connected interconnect the access points in the some other access points wirelessly.. Which mode will the access point not connected to the wired LAN segment use?

You are to recommend wireless LAN equipment that allows a corporate user to place limits on the bandwidth used by each of their wireless users. Which of the following devices would you recommend?

Which of the following specifies how networks use the 802.1x protocol to control network access?

You are concerned about hackers intruding your wireless network. Which of the following settings should you modify on the access point to address this?

Which of the following best defines a data rate boundary?

Which of the following can be used to mitigate the threat from a rogue access point?

Which of the following results when the Power Save Polling mode is used?

Which of the following best defines Multipath?

Which of the following site survey type uses modeling algorithms and attenuation values to create visual models of RF coverage cells?

Which of the following is the level of encryption when using a WEP key with a 40-bit secret key concatenated with the initialization vector to form the WEP key?

Why are DSSS channels more susceptible to narrowband interference than FHSS channels?

You are a consultant installing a wireless LAN that will connect two buildings that are 1.5 miles apart, with data transfer speeds of 11 Mbps. Which of the following antennas should you use?

Which of the following is used to reduce the VSWR?

What is the interval between the main wave's arrival at the receiver and the reflected wave's arrival at a receiver called?

You want to double the distance of a signal. What is the amount in dB by which the EIRP must be increased?

Concentric zones of variable rate bandwidth coverage exist around an access point due to the up shifting and down shifting of client radio cards between data rates. Which of the following specifies this process?

Which of the following is the cell overlap typically needed for seamless roaming?