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Hey guys,

Has anyone ever seen this kind of client behavior before? 1) A client (802.11b scanner) always sends a reassociation frame before sending an authentication frame to the next hop access point. 2) The client STA then gets deauthenticated by the next hop AP. After that, normal authentication and reassociation occurs + 4-way handshake. 3) The previous AP then sends a disassociation to the client STA to remove it from its AID table.
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2016-02-11
3 Photos - View album

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The channel is a hub - short blog

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Any one care to explain the anwer marked in blue?
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CSA pictured.
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Hey there,
I've just popped a quick blog post up relating to the CWDP exam and would appreciate people's thoughts.

Cheers,

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Hoping to start some conversation on Channelization & how Overlapping BSS (OBSS) impacts performance. The general idea is here: http://www.mikealbano.com/2015/10/channelization-obss-impact.html

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Hey guys,

i have a question about fragmentation, i am quoting from the CWAP study guide:

 "Fragments are always sent in what is known as a fragment burst. Once the transmitting station gains control of the medium, it maintains control through two mechanisms: Duration values (which set other stations' NAVs) and SIFS. First, the value of the Duration field in the MAC header of data fragments and ACK frames is used to reserve the medium for the next fragment. As a backup mechanism, SIFS is used between data fragments and ACK frmes in order to preempt those stations that are trying to gain control of the medium using DIFS."

Does this mean that when for example a data frame is fragmented into two frags, the duration value set in the NAV timer of the receiving  STAs/ APs will be set to the duration of the SIFS + ACK (FRAG 0) + SIFS + FRAG 1 + SIFS + ACK? And when the second frag would be send the duration would be set to SIFS + ACK (FRAG 1)?

Thx,
Koen
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