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Exam 8: Wireless Networking

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Question 21

Multiple Choice

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An 802.11g antenna has a geographic range of ____ meters.

A) 20
B) 100
C) 300
D) 330

E) B) and C)
F) C) and D)

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Question 22

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WiMAX is defined by the IEEE 802.11 standard.

A) True
B) False

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Question 23

Multiple Choice

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____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.

In the case of connecting two WLANs, access points could be as far as ____ feet apart.

____________________ means that satellites orbit the Earth at the same rate as the Earth turns.

____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.

In ____, a wireless signal splits into secondary waves when it encounters an obstruction.

Wireless signals experience attenuation.

Describe the use of CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) to access a shared medium.

____ is the least popular WLAN standard.

Describe the wireless spectrum.

Wireless networks are laid out using the same topologies as wired networks.

Spread spectrum is a popular way of making wireless transmissions more secure.

Which satellites transmit and receive signals in the 12 to 18 GHz band?

Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.

A unique characteristic of the 802.11 data frame is its ____ field.

The average geographic range for an 802.11a antenna is ____ meters.

In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.

The use of multiple frequencies to transmit a signal is known as ____________________ technology.

Describe the FHSS and DSSS spread spectrum technologies.