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WATCHGUARD - SECURE WIFI EXAM
1.What does a radio require?ANS A transmitter, A receiver, the over-the-air medium between the transmitter and receiver 2.2.4Ghz has a longer wavelength than 5Ghz but is more susceptible to interference. This means. ANS 2.4Ghz has longer range and can penetrate floors and walls.
3.Dynamic Frequency Selection (DFS) allows wireless devices to ANS 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
- 5 Ghz Bands
ANS 802.11, 802.11b, 802.11g, 802.11n, 802.11ax
ANS 802.11a, 802.11n, 802.11ac, 802.11ax 6.6 Ghz Bands ANS Wi-Fi 6E 1 / 3
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7.Beamforming is used with omnidirectional antennas ANS to increase their strength in the direction of the connected client devices 8.Spatial stream ANS 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 9.If the noise level is too high ANS it can degrade the strength and performance of your wireless signals.
10.Power loss can significantly affect ANS the range and throughput of your wireless devices.
11.Signal strength ANS 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.
12.A decibel (dB) ANS is a relative measure of RF power.
13.A watt ANS is an absolute measure of RF power 14.The signal strength is represented in dBm format (0 to -100) ANS This is the power ratio in decibels (dB) of the measured power referenced to one 2 / 3
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milliwatt (mW).
15.The closer the value is to 0 ANS the stronger the signal. For example, -45 dBm is better signal strength than -65 dBm 16.The noise level is measured in dBm format (0 to -100 dBm) ANS This is the power ratio in decibels (dB) of the measured power referenced to one milliwatt.
17.The closer the value to 0, the greater the noise level ANS Negative values indicate less background noise. For example, -96 dBm is a lower noise level than -20 dBm.
18.The signal-to-noise ratio (SNR) is ANS the power difference between the signal strength and the noise level.
19.SNR (signal-to-noise ratio) is represented as a ANS 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