The L2 switches may collect {HEAD ~ this information} at {TAIL ~ the time} the end user is authenticated, such as by using an end user software access client or a 802.1x port based network access control protocol modified to request such security information 
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The L2 switches may collect { HEAD ~ this information } at { TAIL ~ the time } the end user is authenticated , such as by using an end user software access client or a 802.1x port based network access control protocol modified to request such security information
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