The following picture shows the position of the Protected Fame field in the MAC header.
When the Protected Frame field is set to a value of 1 in a data frame, the MSDU payload of the data frame is indeed encrypted. As the following picture, we could see that ARP is encrypted when Proctected flag = 1.
On the other hand, The majority of management frames are never encrypted, therefore the Protected Frame field will be set to 0. As the following picture, we could see that ARP is not encrypted when Proctected flag = 0.
above the picture from CWAP
When the Protected Frame field is set to a value of 1 in a data frame, the MSDU payload of the data frame is indeed encrypted. As the following picture, we could see that ARP is encrypted when Proctected flag = 1.
On the other hand, The majority of management frames are never encrypted, therefore the Protected Frame field will be set to 0. As the following picture, we could see that ARP is not encrypted when Proctected flag = 0.
The order field is set to 1 when a higher layer has requested that the dat be sent using strictly ordered class of service, which tells the receiving station frames must be processed in order. The field is set to 0 in all other frames.
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