Chapter 8 Quiz Flashcards
WiMAX is defined by the IEEE 802.11 standard. T/F
False
____ satellites are the type used by the most popular satellite data service providers.
Geosynchronous earth orbiting
____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.
Channel bonding
If intermittent and difficult-to-diagnose wireless communication errors occur, ____ might be the culprit.
interference
An 802.11g antenna has a geographic range of ____ meters.
100
To establish a satellite Internet connection, each subscriber must have a ____.
dish antenna
Which satellites transmit and receive signals in the 12 to 18 GHz band?
Ku-
____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.
iwconfig
In the case of connecting two WLANs, access points could be as far as ____ feet apart.
1000
Clients are able to exchange signals with satellites as long as they have a ____ path.
line-of-sight
The average geographic range for an 802.11a antenna is ____ meters.
20
Wireless signals experience attenuation. T/F
True
An ad hoc arrangement would work well for a WLAN with many users. T/F
False
Wireless networks are laid out using the same topologies as wired networks. T/F
False
In ____, a wireless signal splits into secondary waves when it encounters an obstruction.
diffraction
In __ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antenna which results in a point-to-point link.
Fixed
__ is a significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves.
Interference
A directional antenna issues wireless signals along a(n) __ direction.
Single
In wireless communication, to exchange information, two antennas must be tuned to the same __.
Frequency
In ____ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antenna which results in a point-to-point link.
fixed
In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.
active
A unique characteristic of the 802.11 data frame is its ____ field.
Sequence Control
____ is the least popular WLAN standard.
802.11a
Spread spectrum is a popular way of making wireless transmissions more secure.
False
True
True
In wireless communication, to exchange information, two antennas must be tuned to the same ____.
port
variance
frequency
attenuation speed
frequency
A directional antenna issues wireless signals along a(n) ____ direction.
narrow
single
wide
open
single
In ____, a wireless signal splits into secondary waves when it encounters an obstruction.
bounce back
reflection
scattering
diffraction
diffraction
____ is a significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves.
Interference
Attenuation
Fading
Diffraction
interference
In ____ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antenna which results in a point-to-point link.
open
variable
fixed
mobile
fixed
In the case of connecting two WLANs, access points could be as far as ____ feet apart.
500
1000
1200
800
1000
In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.
passive
active
fixed
open
active
A unique characteristic of the 802.11 data frame is its ____ field.
Sequence Control
Frame Control
Data
Duration
Sequence Control
The average geographic range for an 802.11a antenna is ____ meters.
100
600
330
20
20
____ is the least popular WLAN standard.
802.11a
802.11b
802.11g
802.11n
802.11a
An 802.11g antenna has a geographic range of ____ meters.
330
20
100
300
100
____ may use either the 2.4-GHz or 5-GHz frequency range.
802.11n
802.11b
802.11g
802.11a
802.11n
____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.
Frame aggregation
Channel aggregation
Channel bonding
Frame bonding
Channel bonding
____ is an 802.11n network feature allowing the combination of multiple frames into one larger frame.
Frame aggregation
Channel bonding
Frame bonding
Channel aggregation
Frame aggregation
____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.
config
ipconfig
ivconfig
iwconfig
iwconfig
If intermittent and difficult-to-diagnose wireless communication errors occur, ____ might be the culprit.
incorrect antenna placement
SSID mismatch
incorrect encryption
interference
interference
Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.
100
22,300
1240
6,000
22,300
____ satellites are the type used by the most popular satellite data service providers.
Geosynchronous earth orbiting
Low earth orbiting
Medium earth orbiting
Transponder
Geosynchronous earth orbiting
Which satellites transmit and receive signals in the 12 to 18 GHz band?
S-
L-
Ku-
Ka-
Ku-
Clients are able to exchange signals with satellites as long as they have a ____ path.
view
line-of-sight
directional
proprietary
line-of-sight
Clients are able to exchange signals with satellites as long as they have a ____ path.
view
line-of-sight
directional
proprietary
line-of-sight
To establish a satellite Internet connection, each subscriber must have a ____.
dish antenna
line-of-sight antenna
source pathway
dish pathway
dish antenna
