WATCHGUARD - SECURE WIFI EXAM
QUESTIONS WITH CORRECT ANSWERS 2025
WhatZdoesZaZradioZrequire?Z-ZCORRECTZANSWERZ-AZtransmitter,ZAZreceiver,ZtheZover-the-
airZmediumZbetweenZtheZtransmitterZandZreceiver
2.4GhzZhasZaZlongerZwavelengthZthanZ5GhzZbutZisZmoreZsusceptibleZtoZinterference.ZThisZmeans...Z-
ZCORRECTZANSWERZ-2.4GhzZhasZlongerZrangeZandZcanZpenetrateZfloorsZandZwalls.
DynamicZFrequencyZSelectionZ(DFS)ZallowsZwirelessZdevicesZtoZ-ZCORRECTZANSWERZ-
shareZpartsZofZtheZ5ZandZ6ZGhzZfrequency.ZAZ5ZandZ6ZGhzZdeviceZwillZuseZDFSZtoZswitchZchannelsZifZradarZisZd
etected.
2.4GhzZBandsZ-ZCORRECTZANSWERZ-802.11,Z802.11b,Z802.11g,Z802.11n,Z802.11ax
5ZGhzZBandsZ-ZCORRECTZANSWERZ-802.11a,Z802.11n,Z802.11ac,Z802.11ax
6ZGhzZBandsZ-ZCORRECTZANSWERZ-Wi-FiZ6E
BeamformingZisZusedZwithZomnidirectionalZantennasZ-ZCORRECTZANSWERZ-
toZincreaseZtheirZstrengthZinZtheZdirectionZofZtheZconnectedZclientZdevices
SpatialZstreamZ-ZCORRECTZANSWERZ-
isZaZwirelessZdataZsignalZtransmittedZorZreceivedZbyZanZantenna.ZTheZmoreZantennasZanZaccessZpointZhasZth
eZmoreZdataZitZcanZreceive/transmitZatZoneZtime
IfZtheZnoiseZlevelZisZtooZhighZ-ZCORRECTZANSWERZ-
itZcanZdegradeZtheZstrengthZandZperformanceZofZyourZwirelessZsignals.
PowerZlossZcanZsignificantlyZaffectZ-ZCORRECTZANSWERZ-
theZrangeZandZthroughputZofZyourZwirelessZdevices.
, SignalZstrengthZ-ZCORRECTZANSWERZ-
isZtheZwirelessZsignalZpowerZlevelZreceivedZbyZaZwirelessZclient.ZAZstrongZsignalZstrengthZresultsZinZmoreZreli
ableZconnectionsZandZhigherZspeedsZbutZcanZalsoZcauseZinterferenceZwithZnearbyZdevices.
AZdecibelZ(dB)Z-ZCORRECTZANSWERZ-isZaZrelativeZmeasureZofZRFZpower.
AZwattZ-ZCORRECTZANSWERZ-isZanZabsoluteZmeasureZofZRFZpower
TheZsignalZstrengthZisZrepresentedZinZdBmZformatZ(0ZtoZ-100)Z-ZCORRECTZANSWERZ-
ThisZisZtheZpowerZratioZinZdecibelsZ(dB)ZofZtheZmeasuredZpowerZreferencedZtoZoneZmilliwattZ(mW).
TheZcloserZtheZvalueZisZtoZ0Z-ZCORRECTZANSWERZ-theZstrongerZtheZsignal.ZForZexample,Z-
45ZdBmZisZbetterZsignalZstrengthZthanZ-65ZdBm
TheZnoiseZlevelZisZmeasuredZinZdBmZformatZ(0ZtoZ-100ZdBm)Z-ZCORRECTZANSWERZ-
ThisZisZtheZpowerZratioZinZdecibelsZ(dB)ZofZtheZmeasuredZpowerZreferencedZtoZoneZmilliwatt.
TheZcloserZtheZvalueZtoZ0,ZtheZgreaterZtheZnoiseZlevelZ-ZCORRECTZANSWERZ-
NegativeZvaluesZindicateZlessZbackgroundZnoise.ZForZexample,Z-96ZdBmZisZaZlowerZnoiseZlevelZthanZ-
20ZdBm.
TheZsignal-to-noiseZratioZ(SNR)ZisZ-ZCORRECTZANSWERZ-
theZpowerZdifferenceZbetweenZtheZsignalZstrengthZandZtheZnoiseZlevel.
SNRZ(signal-to-noiseZratio)ZisZrepresentedZasZaZ-ZCORRECTZANSWERZ-
dBmZvalue.ZYouZshouldZhaveZaZminimumZofZ+25ZdBmZsignal-to-
noiseZratio.ZLowerZvaluesZthanZ+25ZdBmZresultZinZpoorZperformanceZandZspeeds
IfZyouZhaveZaZ-41ZdBmZsignalZstrength,ZandZaZ-50ZdBmZnoiseZlevelZ-ZCORRECTZANSWERZ-
thisZresultsZinZaZpoorZsignal-to-noiseZratioZofZ+9ZdBm
IfZyouZhaveZaZ-41ZdBmZsignalZstrength,ZandZaZ-96ZdBmZnoiseZlevelZ-ZCORRECTZANSWERZ-
thisZresultsZinZanZexcellentZsignal-to-noiseZratioZofZ+55ZdBm
QUESTIONS WITH CORRECT ANSWERS 2025
WhatZdoesZaZradioZrequire?Z-ZCORRECTZANSWERZ-AZtransmitter,ZAZreceiver,ZtheZover-the-
airZmediumZbetweenZtheZtransmitterZandZreceiver
2.4GhzZhasZaZlongerZwavelengthZthanZ5GhzZbutZisZmoreZsusceptibleZtoZinterference.ZThisZmeans...Z-
ZCORRECTZANSWERZ-2.4GhzZhasZlongerZrangeZandZcanZpenetrateZfloorsZandZwalls.
DynamicZFrequencyZSelectionZ(DFS)ZallowsZwirelessZdevicesZtoZ-ZCORRECTZANSWERZ-
shareZpartsZofZtheZ5ZandZ6ZGhzZfrequency.ZAZ5ZandZ6ZGhzZdeviceZwillZuseZDFSZtoZswitchZchannelsZifZradarZisZd
etected.
2.4GhzZBandsZ-ZCORRECTZANSWERZ-802.11,Z802.11b,Z802.11g,Z802.11n,Z802.11ax
5ZGhzZBandsZ-ZCORRECTZANSWERZ-802.11a,Z802.11n,Z802.11ac,Z802.11ax
6ZGhzZBandsZ-ZCORRECTZANSWERZ-Wi-FiZ6E
BeamformingZisZusedZwithZomnidirectionalZantennasZ-ZCORRECTZANSWERZ-
toZincreaseZtheirZstrengthZinZtheZdirectionZofZtheZconnectedZclientZdevices
SpatialZstreamZ-ZCORRECTZANSWERZ-
isZaZwirelessZdataZsignalZtransmittedZorZreceivedZbyZanZantenna.ZTheZmoreZantennasZanZaccessZpointZhasZth
eZmoreZdataZitZcanZreceive/transmitZatZoneZtime
IfZtheZnoiseZlevelZisZtooZhighZ-ZCORRECTZANSWERZ-
itZcanZdegradeZtheZstrengthZandZperformanceZofZyourZwirelessZsignals.
PowerZlossZcanZsignificantlyZaffectZ-ZCORRECTZANSWERZ-
theZrangeZandZthroughputZofZyourZwirelessZdevices.
, SignalZstrengthZ-ZCORRECTZANSWERZ-
isZtheZwirelessZsignalZpowerZlevelZreceivedZbyZaZwirelessZclient.ZAZstrongZsignalZstrengthZresultsZinZmoreZreli
ableZconnectionsZandZhigherZspeedsZbutZcanZalsoZcauseZinterferenceZwithZnearbyZdevices.
AZdecibelZ(dB)Z-ZCORRECTZANSWERZ-isZaZrelativeZmeasureZofZRFZpower.
AZwattZ-ZCORRECTZANSWERZ-isZanZabsoluteZmeasureZofZRFZpower
TheZsignalZstrengthZisZrepresentedZinZdBmZformatZ(0ZtoZ-100)Z-ZCORRECTZANSWERZ-
ThisZisZtheZpowerZratioZinZdecibelsZ(dB)ZofZtheZmeasuredZpowerZreferencedZtoZoneZmilliwattZ(mW).
TheZcloserZtheZvalueZisZtoZ0Z-ZCORRECTZANSWERZ-theZstrongerZtheZsignal.ZForZexample,Z-
45ZdBmZisZbetterZsignalZstrengthZthanZ-65ZdBm
TheZnoiseZlevelZisZmeasuredZinZdBmZformatZ(0ZtoZ-100ZdBm)Z-ZCORRECTZANSWERZ-
ThisZisZtheZpowerZratioZinZdecibelsZ(dB)ZofZtheZmeasuredZpowerZreferencedZtoZoneZmilliwatt.
TheZcloserZtheZvalueZtoZ0,ZtheZgreaterZtheZnoiseZlevelZ-ZCORRECTZANSWERZ-
NegativeZvaluesZindicateZlessZbackgroundZnoise.ZForZexample,Z-96ZdBmZisZaZlowerZnoiseZlevelZthanZ-
20ZdBm.
TheZsignal-to-noiseZratioZ(SNR)ZisZ-ZCORRECTZANSWERZ-
theZpowerZdifferenceZbetweenZtheZsignalZstrengthZandZtheZnoiseZlevel.
SNRZ(signal-to-noiseZratio)ZisZrepresentedZasZaZ-ZCORRECTZANSWERZ-
dBmZvalue.ZYouZshouldZhaveZaZminimumZofZ+25ZdBmZsignal-to-
noiseZratio.ZLowerZvaluesZthanZ+25ZdBmZresultZinZpoorZperformanceZandZspeeds
IfZyouZhaveZaZ-41ZdBmZsignalZstrength,ZandZaZ-50ZdBmZnoiseZlevelZ-ZCORRECTZANSWERZ-
thisZresultsZinZaZpoorZsignal-to-noiseZratioZofZ+9ZdBm
IfZyouZhaveZaZ-41ZdBmZsignalZstrength,ZandZaZ-96ZdBmZnoiseZlevelZ-ZCORRECTZANSWERZ-
thisZresultsZinZanZexcellentZsignal-to-noiseZratioZofZ+55ZdBm
