Cisco Support Community

Webcast Recording: 802.11 Frames: An In-Depth Overview with VIP George Stefanick

Expert Series Webcast:  802.11 Frames: An In-Depth Overview Webcast
August 26, 2014

I cover a number of advanced topics on the 802.11 protocol and walk you through the different types of 802.11 frames and their purpose. I show how a packet turns into a frame; how that frame turns into bits; and, lastly, how the bits get modulated into the air.

You have heard that Wi-Fi is half duplex, right? Let's tackle the complex discussion of CSMA-CA and break down Layer 1 Carrier Sense and Layer 2 Network Allocation Vector, explaining how both work in concert to make sure of a lower probability that two or more stations will not transmit at the same time. I also give a status of my All Wi-Fi office (AWO) with Cisco 3700 802.11ac access points.

You just deployed Cisco 802.11ac access points, and you want to sniff frames? No problem. I share my real-world experience sniffing 802.11ac frames with Wildpacket OmniPeek directly from Cisco 3700s.

If you design, deploy, or manage a Wi-Fi network, do not miss this session.


•  Management, control, and data frames

•  LLC, MAC, PLCP, PMD: Know the layers and what each layer does

•  CSMA-CA (Layer 1) Carrier Sense and (Layer 2) Network Allocation Vector

•  How to capture 802.11ac frames from a Cisco access point


Cisco Designated VIP George Stefanick is a wireless architect employed by Houston Methodist Hospital System. George manages a large and complex wireless network that includes more than 2500 access points and upward of 11,000 concurrent Wi-Fi clients. George has been in wireless communications since 1997 and holds various vendor and vendor-neutral certifications. He focuses on high-density indoor deployments in the healthcare vertical, thereby using his hands-on experience in site survey, RFID, and voice design. As a consultant, George has consulted with Fortune 500 companies using his real-world hands-on experience to meet the needs and challenges in today’s enterprise environments. George is a Cisco Support Community VIP 2012, 2013, and 2014 and Aruba MVP 2014.

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Excellent information that ive come across. Very informative especially for individuals that are learning the ins and outs of WiFi.

Hope you will do some tutorials for the Cisco Wireless Products.