Archive for the
‘Frame Analysis’ Category

In 802.11ax communications, the trigger frame is used for multiple purposes. One of them is to allocate ressources for a specific multi-user OFDMA transmission. In this article, we are going to take a deeper look at some of the interesting fields we will find in this trigger frame. For more details, you can look at section [...]
As you know, all data rates are changing with 802.11ax, Hence, the new MCS table you can find here: https://www.semfionetworks.com/blog/mcs-table-updated-with-80211ax-data-rates In this article, we will see how we can figure out the data rate of a specific 802.11ax data frame. If you want to know how to capture 802.11ax data frames, refer to this article [...]
This infographic was inspired by the work of Nigel Bowden and Devin Akin. Nigel wrote this really good article on DFS that you can find on his website wifinigel.blogpost.com. Devin presented a really detailed webinar on DFS in partnership with Netscout. You can find the recording here. I would encourage you to go and take a look at their ressources. Note: [...]
Today’s exercice is simple: study the beacon frame and try to figure out what characteristics of the Wi-Fi network are advertised. In this article, we will be focusing on IEEE 802.11k support. PRESENTATION OF IEEE 802.11K IEEE 802.11k-2008 or "Radio Resource Measurement" (not to confused with the Radio Resource Management used by Cisco Wireless LAN Controllers) [...]
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