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(TCO 9) Differentiate narrowband interference and all-band interference on a WLAN. Name two methods that one could adopt to remedy a narrowband interference. Name two methods that could help curb the all-band interference generated by bluetooth devices.

1. (TCO 1) When an RF signal moves from one medium to another of a different density, the signal actually bends instead of traveling in a straight line. This is known as _____. (Points : 5)
reflection

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(TCO 9) Differentiate narrowband interference and all-band interference on a WLAN. Name two methods that one could adopt to remedy a narrowband interference. Name two methods that could help curb the all-band interference generated by bluetooth devices.

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absorption

refraction

scattering

Question 2.2. (TCO 3) A loss of 10 decibels means that _____% of the power has been lost in mW. (Points : 5)
10

30

90

100

Question 3.3. (TCO 2) Which is the lowest frequency commonly used for unlicensed radio frequency connections? (Points : 5)
700 GHz

800 Hz

800 GHz

700 MHz

Question 4.4. (TCO 1) Which affects the WLAN coverage pattern? (Points : 5)
Wireless network protocols

Objects that interfere with the RF signal

Notebook operating systems

Skill of the person conducting the site survey

Question 5.5. (TCO 4) The Microsoft Windows operating system is an example of _____ standards. (Points : 5)
de jure

consortia-created

request for comments (RFC)

de facto

Question 6.6. (TCO 5) In an infrastructure network, the beacon interval is normally set to _____ ms, although it can be modified. (Points : 5)
1

10

100

1,000

Question 7.7. (TCO 6) A free space optics (FSO) connection between two buildings is most impeded by the presence of which weather condition? (Points : 5)
Fog

Rain

Mist

Wind

Question 8.8. (TCO 7) Most industry experts recommend one access point for no more than _____ users if they are performing basic e-mail, light web surfing, and occasionally transferring medium-sized files. (Points : 5)
10

30

50

100

Question 9.9. (TCO 8) _____ was designed to address WEP vulnerabilities with a minimum of inconvenience. (Points : 5)
IEEE 802.11i

TGi

Dynamic WEP

WPA

Question 10.10. (TCO 8) RC4 is a _____ cipher that accepts keys up to 128 bits in length.(Points : 5)
stream

key

block

logical
Page 2
Question 1.1. (TCO 9) A common source of interference in 802.11b and g networks would be which? (Points : 5)
Fluorescent light

Convection oven

Microwave oven

Electric stapler

Question 2.2. (TCO 10) Which is an application of RFID technology? (Points : 5)
Cards with embedded RFID chips are widely used as electronic cash in casinos.

Major retailers are requiring that cases and pallets of merchandise shipped to their warehouses from large vendors have an RFID tag affixed.

Beginning in 2005, U.S. passports will have an RFID tag embedded in the document.

All of the above

Question 3.3. (TCO 6) Remote wireless _____ are ideal solutions for connecting sites, such as satellite offices, remote campus settings, or temporary office locations, when the sites are separated by obstacles, such as bodies of water, freeways, or railroads, which make using a wired connection impractical or very expensive. (Points : 5)
routers

bridges

clients

gateways

Question 4.4. (TCO 7) Access points are typically mounted on a _____ to reduce interference from surrounding objects. (Points : 5)
ceiling

floor

window

door

Question 5.5. (TCO 8) _____ engineering relies on tricking or deceiving someone to give a hacker access to a system. (Points : 5)
Brute force

Temporal key integrity protocol (TKIP)

Social

Probe request

Question 6.6. (TCO 9) A _____ is the tool used to visualize a radio frequency signal. (Points : 5)
fragment

packet sniffer

spectrum analyzer

All of the above

Question 7.7. (TCO 1) A _____ transmission means that a frame is sent from one sender to multiple receivers with a single “transmit” operation. (Points : 5)
single

unicast

multicast

multiple

Question 8.8. (TCO 8) Following authentication, if the access point accepts the wireless device, it reserves memory space in the AP and establishes a(n) _____ ID for it. (Points : 5)
association

device

member

authentication

Question 9.9. (TCO 5) When an AP accepts or rejects a wireless device, it sends a(n) _____ frame. (Points : 5)
association request

association response

disassociation

reassociation

Question 10.10. (TCO 1) How does OFDM work? (Points : 5)
Signals are broken up and the parts are sent in parallel.

The same signal is sent on multiple channels.

One signal is sent twice on the same channel.

A signal is sent over a wired network at the same time as the wireless network
(TCO 3) How does an antenna work? (Points : 20)

Question 2.2. (TCO 4) What are the responsibilities of the FCC? (Points : 20)

Question 3.3. (TCO 5) Describe the history, frequency band, and supported data rates of the IEEE 802.11b standard. (Points : 20)

Question 4.4. (TCO 6) Differentiate the fixed WiMax and mobile WiMax technologies. (Points : 20)

Question 5.5. (TCO 1) How does OFDM mitigate WLAN transmission problems caused by multipath distortion? (Points : 20)

Question 6.6. (TCO 2) There are several factors that may result in RF signal loss. List and describe three of them. (Points : 20)

1. (TCO 7) When should an 802.11a network be installed instead of an 802.11g network? (Points : 20)

Question 2.2. (TCO 8) What is a dictionary attack? (Points : 20)

Question 3.3. (TCO 10) Amanda’s car is equipped with hands-free cellular calling based on the Bluetooth wireless standard. Explain how this device helps Amanda during her commute.

Correct Answer: (Points : 20)

Question 4.4. (TCO 9) Differentiate narrowband interference and all-band interference on a WLAN. Name two methods that one could adopt to remedy a narrowband interference. Name two methods that could help curb the all-band interference generated by bluetooth devices. (Points : 20)


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