Celebrating my newfound predilection for short blog posts, I am compelled to share this little tidbit of humor from the 802.11ac draft specification.
If Wi-Fi is your game, you don’t want to miss the Tech Field Day Wi-Fi Mobility Symposium on Wednesday, January 25. Industry expert (CWNE and CCIE-Wireless) Andrew VonNagy, will be co-moderating the event with an industry slug, yours truly. Expect some rousing, friendly debate, loads of pertinent information, and interactive Q&A to address everything you want to know.
Come one, come all. There’s a new bi-weekly WLAN podcast/website called the No Strings Attached Show. The website just launched and the first podcast was posted last week. Consider the show a distributed effort with contributions from these fine individuals.
The title is deceptive. Now that I have you thinking about WLAN controllers and fast secure roaming, my goal in this short post is to point out why WLAN controllers do not sufficiently address fast secure roaming. Why must I write such an article? Because in the past six months, I’ve read article after article claiming that the cure to fast secure roaming problems is a WLAN controller. IT IS NOT! I have nothing against controllers per se; I just want to set the record straight. My point is actually twofold.
For us wireless folks that aren’t stellar routing and switching guys, one of the most daunting network tasks is integrating our WLAN infrastructure with the existing wired infrastructure and its services. Understanding wired design topics is pretty fundamental to installing or managing any network, so it really should be on our priority list to spruce up those skills. To give you a nudge on your journey, let’s talk about DHCP for wireless clients.
Today – just in time for Christmas – we’re happy to announce the availability of the Official CWTS Video Course, based on the Enterprise Wi-Fi Fundamentals course and using the official CWTS courseware. Marcus Burton has created an excellent narrative for learning the basic concepts behind Wi-Fi technologies, and this video offering will help anyone learn Wi-Fi and prepare for the CWTS exam.
Detecting and identifying radio transmitters in the Wi-Fi bands is an art. Gaining skill at this art requires knowledge and practice. Thankfully, there are tools that help us along the way by providing automated device identification, and those tools are becoming more sophisticated. But, there are different ways to skin the proverbial cat, and as new methods and features for device identification come to market, understanding how they work is the first step in determining their value. Let’s take a quick look at the different ways to identify and classify RF transmitters with a spectrum analyzer.
Just when you think you pretty much understand 802.11n, you turn the corner and realize there’s more to learn. This time, the topic was non-HT duplicate and HT duplicate. I’d read before about the non-HT Duplicate format, but I had never realized that there is also an HT Duplicate format, which is the use of MCS 32. I’d like to document how they work and what they’re for, even if I’m the only one who cares.
One of the most commonly confused concepts in 802.11n is the use of multiple input, multiple output (MIMO). There’s a ton of technical detail to understand in 802.11n, and for everyday network management, most of it is beyond the realm of necessary information. For us non-degreed engineers (what I call a pseudo-engineer), it’s easy to get lost in the numbers, formulas, and diversity schemes of 802.11n, but MIMO is a basic concept that networking folks should understand well.
CWNP Blog Roll
- The Need for Speed May 16, 2012 Devin Akin
- BYOD: No Longer a Four-Letter Word to Enterprise IT Leaders? May 16, 2012 Joseph Bradley
- Setting Up Partners For Failure? May 16, 2012 Matthew Norwood
- Setting Up Partners For Failure? May 16, 2012 Matthew Norwood
- It Could Happen to You! May 14, 2012 Annette Blum
- Ode to Vucajnk May 14, 2012 Devin Akin
- Aerohive Training Part II: The Video. May 11, 2012 Andrew vonNagy
- The telecoms industry and a dual-dilemma problem May 11, 2012 Dean Bubley
- Webinar next Wednesday: Delivering Reliable Wireless Services in Healthcare – Better Communications for Better Care May 11, 2012 ekahau
- Phone number as OTT identifier - a problem in the making? May 11, 2012 Dean Bubley
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