George Stafanick

George Stafanick

Blog Contributor

Posts (10)

802.11 - TIM and DTIM Information Elements

802.11 – TIM and DTIM Information Elements

The Traffic Indication Map (TIM) and Delivery Traffic Indication Map (DTIM) is the focus of this blog post. Lets dive deep and understand what these Information Elements are and how they're used in...

What does Wi-Fi stand for?

What does Wi-Fi stand for?

Let's start 2016 with a blog post that will surely get some of you thinking. As a professional who focuses on Wi-Fi communication I'm asked from time to time what does Wi-Fi mean?

802.11 - Action Frames

802.11 – Action Frames

The 802.11 standard section 8.5 comments on action frames. Action frames are interesting. Action frames can be triggered by access points or client stations. The action frame provides information and direction...

More Power More Problems

More Power More Problems

In the wireless world we often think more power is good. The louder the signal surely higher the performance gain. I am sorry to say that is not true in most cases. 

How losing voice QoS markings on the wired made my WiFi voice call stink downstream!

How losing voice QoS markings on the wired made my WiFi voice call stink downstream!

Wirelessguru is back with another real world example. Wired QoS management is critical to downstream wireless voice reliability. Packets not properly marked end up in the BE queue behind all other traffic...

802.11 - Duration / ID Field

802.11 – Duration / ID Field

I'm back with more 802.11 captures and real world examples! This blog post we look at the Duration / ID field in 802.11 frames! Enjoy!

Access Point Supporting PCF  -  (Contention Free Parameter)

Access Point Supporting PCF – (Contention Free Parameter)

A recent frame capture turned up a mytical WiFi creature. Legend has it few if any vendos supported PCF.   

Real World Examples of Device RSSI Comparison

Real World Examples of Device RSSI Comparison

Digging deep into WirelesssGuru's archives - Two Real World Examples of Device RSSI Comparison. 

You lost your PSK (PreShareKey) to your wireless network ?

You lost your PSK (PreShareKey) to your wireless network ?

If you’re reading this you’re probably in a panic because you lost or forgot your PSK to your wireless network. This Blog post is for you! 

My Aruba Atmosphere 2015 Experience

My Aruba Atmosphere 2015 Experience

The Aruba HP acquisition was on everyones mind, up to this point it was rumor and the constant “no comment was mentioned when I asked anyone at Aruba about the purchase, typical protocol when something...