Watchguard - Secure WIFI Exam
What does a radio require? - answer A transmitter, A receiver, the over-the-air medium
between the transmitter and receiver
2.4Ghz has a longer wavelength than 5Ghz but is more susceptible to interference. This
means... - answer2.4Ghz has longer range and can penetrate floors and walls.
Dynamic Frequency Selection (DFS) allows wireless devices to - answer share parts of
the 5 and 6 Ghz frequency. A 5 and 6 Ghz device will use DFS to switch channels if
radar is detected.
2.4Ghz Bands - answer802.11, 802.11b, 802.11g, 802.11n, 802.11ax
5 Ghz Bands - answer802.11a, 802.11n, 802.11ac, 802.11ax
6 Ghz Bands - answer Wi-Fi 6E
Beamforming is used with omnidirectional antennas - answerto increase their strength
in the direction of the connected client devices
Spatial stream - answeris a wireless data signal transmitted or received by an antenna.
The more antennas an access point has the more data it can receive/transmit at one
time
If the noise level is too high - answerit can degrade the strength and performance of
your wireless signals.
Power loss can significantly affect - answerthe range and throughput of your wireless
devices.
Signal strength - answeris the wireless signal power level received by a wireless client.
A strong signal strength results in more reliable connections and higher speeds but can
also cause interference with nearby devices.
A decibel (dB) - answeris a relative measure of RF power.
A watt - answeris an absolute measure of RF power
The signal strength is represented in dBm format (0 to -100) - answerThis is the power
ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).
, The closer the value is to 0 - answerthe stronger the signal. For example, -45 dBm is
better signal strength than -65 dBm
The noise level is measured in dBm format (0 to -100 dBm) - answerThis is the power
ratio in decibels (dB) of the measured power referenced to one milliwatt.
The closer the value to 0, the greater the noise level - answerNegative values indicate
less background noise. For example, -96 dBm is a lower noise level than -20 dBm.
The signal-to-noise ratio (SNR) is - answerthe power difference between the signal
strength and the noise level.
SNR (signal-to-noise ratio) is represented as a - answerdBm value. You should have a
minimum of +25 dBm signal-to-noise ratio. Lower values than +25 dBm result in poor
performance and speeds
If you have a -41 dBm signal strength, and a -50 dBm noise level - answerthis results in
a poor signal-to-noise ratio of +9 dBm
If you have a -41 dBm signal strength, and a -96 dBm noise level - answerthis results in
an excellent signal-to-noise ratio of +55 dBm
Must not only plan for coverage for the wireless signal but also - answerthe types of
applications that will be used and the types of wireless devices that will use them. Such
as a Macbook's wifi will be faster than a tablet.
Must determine use cases - answerSuch as a school requirements will be different from
a small business. Need to factor in types of data (video streams/web
browsing/webinars), how many devices will need to be connected to each AP, and how
fast those devices are.
A site survey helps determine - answerthe physical and airspace characteristics of your
environment.
Use heatmap tools before an install - answerto help plan AP placement by measuring
signal strength from different locations.
Use heatmap tools after install - answerto make adjustments and access real-world
signal strength and range.
Use Predictive Site Survey tools with an - answeraccurate floorplan to help with AP
placement and channel planning.
A Manual Site Survey can be done using - answerjust a smartphone to measure signal
strength.
What does a radio require? - answer A transmitter, A receiver, the over-the-air medium
between the transmitter and receiver
2.4Ghz has a longer wavelength than 5Ghz but is more susceptible to interference. This
means... - answer2.4Ghz has longer range and can penetrate floors and walls.
Dynamic Frequency Selection (DFS) allows wireless devices to - answer share parts of
the 5 and 6 Ghz frequency. A 5 and 6 Ghz device will use DFS to switch channels if
radar is detected.
2.4Ghz Bands - answer802.11, 802.11b, 802.11g, 802.11n, 802.11ax
5 Ghz Bands - answer802.11a, 802.11n, 802.11ac, 802.11ax
6 Ghz Bands - answer Wi-Fi 6E
Beamforming is used with omnidirectional antennas - answerto increase their strength
in the direction of the connected client devices
Spatial stream - answeris a wireless data signal transmitted or received by an antenna.
The more antennas an access point has the more data it can receive/transmit at one
time
If the noise level is too high - answerit can degrade the strength and performance of
your wireless signals.
Power loss can significantly affect - answerthe range and throughput of your wireless
devices.
Signal strength - answeris the wireless signal power level received by a wireless client.
A strong signal strength results in more reliable connections and higher speeds but can
also cause interference with nearby devices.
A decibel (dB) - answeris a relative measure of RF power.
A watt - answeris an absolute measure of RF power
The signal strength is represented in dBm format (0 to -100) - answerThis is the power
ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).
, The closer the value is to 0 - answerthe stronger the signal. For example, -45 dBm is
better signal strength than -65 dBm
The noise level is measured in dBm format (0 to -100 dBm) - answerThis is the power
ratio in decibels (dB) of the measured power referenced to one milliwatt.
The closer the value to 0, the greater the noise level - answerNegative values indicate
less background noise. For example, -96 dBm is a lower noise level than -20 dBm.
The signal-to-noise ratio (SNR) is - answerthe power difference between the signal
strength and the noise level.
SNR (signal-to-noise ratio) is represented as a - answerdBm value. You should have a
minimum of +25 dBm signal-to-noise ratio. Lower values than +25 dBm result in poor
performance and speeds
If you have a -41 dBm signal strength, and a -50 dBm noise level - answerthis results in
a poor signal-to-noise ratio of +9 dBm
If you have a -41 dBm signal strength, and a -96 dBm noise level - answerthis results in
an excellent signal-to-noise ratio of +55 dBm
Must not only plan for coverage for the wireless signal but also - answerthe types of
applications that will be used and the types of wireless devices that will use them. Such
as a Macbook's wifi will be faster than a tablet.
Must determine use cases - answerSuch as a school requirements will be different from
a small business. Need to factor in types of data (video streams/web
browsing/webinars), how many devices will need to be connected to each AP, and how
fast those devices are.
A site survey helps determine - answerthe physical and airspace characteristics of your
environment.
Use heatmap tools before an install - answerto help plan AP placement by measuring
signal strength from different locations.
Use heatmap tools after install - answerto make adjustments and access real-world
signal strength and range.
Use Predictive Site Survey tools with an - answeraccurate floorplan to help with AP
placement and channel planning.
A Manual Site Survey can be done using - answerjust a smartphone to measure signal
strength.
