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Cisco Wireless Compatibility Matrix (Nov. 2011)

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    Podcasts / Videos

    My80211 Videos

    Cisco: 802 11 frames with Cisco VIP George Stefanick

    Fluke Networks: Minimize Wi Fi Network Downtime

    Aruba: Packets never lie: An in-depth overview of 802.11 frames

    ATM15 Ten Talk “Wifi drivers and devices”

    Houston Methodist Innovates with Wireless Technology

    Bruce Frederick Antennas (1/2)


    Bruce Frederick dB,dBi,dBd (2/2)

    Cisco AP Group Nugget

    Social Links
    Revolution WiFi Capacity Planner

    Anchor / Office Extends Ports


    Peek Inside Cisco's Gear

    See inside Cisco's latest wireless gear!

    2.4 GHz Channel Overlap

    EXAMPLE 1  


    EXAMPLE 3  

    CWSP RELEASE DATE 2/08/2010
    • CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
      CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
      by David D. Coleman, David A. Westcott, Bryan E. Harkins, Shawn M. Jackman

      Shawn Jackman (Jack) CWNE#54 is a personal friend and has been a mentor to me for many years.  I've had the pleasure and opportunity to work with Jack for 4 years. Jack is a great teacher who takes complex 802.11 standards and breaks them down so almost anyone can understand the concept at hand. I'm excited for you brother. Great job and job well done! Put another notch in the belt!

    IEEE 802.11a/g/n Reference Sheet


    LWAPP QoS Packet Tagging



    Interference Types


    Microwave Oven

    Cordless Phone


    Welcome to journal (launched January 2009), where I will share with you my journey through 802.11. I'm George Stefanick, a Sr Wireless Consultant for a Healthcare and Enterprise Mobility company located in the greater Philadelphia area, servicing customers in the Healthcare and Enterprise industries.

    By day ~ I design, deploy, secure, conduct pre/post sales and troubleshoot Data, VoIP and RFID WLANs in today's Healthcare and Enterprise environments.

    Deploying a properly designed WLAN in today's Healthcare and Enterprise environments is no easy task and should never be considered lightly. We shouldn't be surprised, wireless users today will not tolerate 'issues' of any sort and demand the same reliability as wired connections. As wireless technology develops, so has the demand of mobile applications. In the last two years, use of mobile applications relying specifically on wireless have ski rocketed. Just five years ago, VoIP over 802.11 was a pipe dream, today it's adopted by most Healthcare systems. The next fronteer is active RFID over wireless.

    By night ~as the saying goes, "the devil is in the details" I am fascinated with the 802.11 protocol. In fact its an addiction of sorts. With the recent addition of the IEEE 802.11n standard, the black magic is still alive and well.

    So, you may ask, why the journal. Its pretty simple I suppose. I want to have a place to call home for my labs, studies, security exploits, application reviews, troubleshooting efforts, spectrum analysis, and certifications. Wireless is an ever expanding force in todays enterprise networks and it's growth is unmatched in today's networking.

    These studies have been of great value to customers and wireless engineers a like. So I hope you find my work of value and benefits you in your personal journey with 802.11.

    Our journey begins right here with packet captures, performance enhancements, troubleshooting, WLAN security (hacking), RFID, VoIP over wireless, spectrum analysis and wireless certifications.

    So lets dive in shall we !


    George M. Stefanick Jr. | Sr. 802.11 Design Architect & Engineer
    Skype 717.798.8255 "george.stefanick" |  Mobile: 432.698.0211 (432.MY80211) | Email:

    My Site: