Watchguard - Secure WiFi Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What does a radio require? - CORRECT 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... -
CORRECT ANSWER 2.4Ghz has longer range and can penetrate floors and walls.
Dynamic Frequency Selection (DFS) allows wireless devices to - CORRECT 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 - CORRECT ANSWER 802.11, 802.11b, 802.11g, 802.11n, 802.11ax
5 Ghz Bands - CORRECT ANSWER 802.11a, 802.11n, 802.11ac, 802.11ax
6 Ghz Bands - CORRECT ANSWER Wi-Fi 6E
Beamforming is used with omnidirectional antennas - CORRECT ANSWER to increase their
strength in the direction of the connected client devices
Spatial stream - CORRECT ANSWER is 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 - CORRECT ANSWER it can degrade the strength and
performance of your wireless signals.
Power loss can significantly affect - CORRECT ANSWER the range and throughput of your
wireless devices.
, Signal strength - CORRECT ANSWER is 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) - CORRECT ANSWER is a relative measure of RF power.
A watt - CORRECT ANSWER is an absolute measure of RF power
The signal strength is represented in dBm format (0 to -100) - CORRECT ANSWER This is the
power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).
The closer the value is to 0 - CORRECT ANSWER the 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) - CORRECT ANSWER This 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 - CORRECT ANSWER Negative values
indicate less background noise. For example, -96 dBm is a lower noise level than -20 dBm.
The signal-to-noise ratio (SNR) is - CORRECT ANSWER the power difference between the
signal strength and the noise level.
SNR (signal-to-noise ratio) is represented as a - CORRECT ANSWER dBm 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 - CORRECT ANSWER this
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 - CORRECT ANSWER this
results in an excellent signal-to-noise ratio of +55 dBm
UPDATED QUESTIONS AND CORRECT
ANSWERS
What does a radio require? - CORRECT 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... -
CORRECT ANSWER 2.4Ghz has longer range and can penetrate floors and walls.
Dynamic Frequency Selection (DFS) allows wireless devices to - CORRECT 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 - CORRECT ANSWER 802.11, 802.11b, 802.11g, 802.11n, 802.11ax
5 Ghz Bands - CORRECT ANSWER 802.11a, 802.11n, 802.11ac, 802.11ax
6 Ghz Bands - CORRECT ANSWER Wi-Fi 6E
Beamforming is used with omnidirectional antennas - CORRECT ANSWER to increase their
strength in the direction of the connected client devices
Spatial stream - CORRECT ANSWER is 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 - CORRECT ANSWER it can degrade the strength and
performance of your wireless signals.
Power loss can significantly affect - CORRECT ANSWER the range and throughput of your
wireless devices.
, Signal strength - CORRECT ANSWER is 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) - CORRECT ANSWER is a relative measure of RF power.
A watt - CORRECT ANSWER is an absolute measure of RF power
The signal strength is represented in dBm format (0 to -100) - CORRECT ANSWER This is the
power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).
The closer the value is to 0 - CORRECT ANSWER the 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) - CORRECT ANSWER This 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 - CORRECT ANSWER Negative values
indicate less background noise. For example, -96 dBm is a lower noise level than -20 dBm.
The signal-to-noise ratio (SNR) is - CORRECT ANSWER the power difference between the
signal strength and the noise level.
SNR (signal-to-noise ratio) is represented as a - CORRECT ANSWER dBm 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 - CORRECT ANSWER this
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 - CORRECT ANSWER this
results in an excellent signal-to-noise ratio of +55 dBm
