2019 in Review

What a Year!

2019 has been a wild ride for NC-Expert! We started the year by becoming a CompTIA ( comptia.org) partner in our own right. Until 2019, we had offered authorized classes through our partners but, in early 2019, we became a direct partner and can now offer these classes using our in-house team of instructors. We were thrilled to be granted this partnership.

Once again, we renewed our sponsorship of the WLA – the Wireless LAN Association – an association for professional wireless engineers. We support its mission of providing an invaluable service in the Wireless Network industry. The WLA’s main goal is to create a set of peer-reviewed standards, backed by some of the biggest names in the industry. In addition, it aims to create, and open, a dialog between the regulators-and-manufacturers of wireless networking equipment and the “boots on the ground” – the engineers who are responsible for making everything work in harmony. In fact, because we believe so strongly in the WLA’s mission that our CEO, Rie Vainstein, accepted an invitation to become CEO of this voluntary organization!

In 2019, we were pleased to present our fledgling Kali Linux Bootcamp and Deep Dive at the WLPC Conference in Phoenix, Arizona, and again (by popular demand) in Prague, Czech Republic! We have been overwhelmed by the positive responses received and look forward to offering this course to the general public as we progress into the New Year.

We continue to work with our partner CWNP ( cwnp.com). Through our Instructor Team Lead, Phil Morgan, we were able to help CWNP create its new CWSP course which, since its release in September, we have been pleased to regularly present to our students.

We have spent a good portion of our year working diligently with our partner, Cisco ( cisco.com), to author a portion of its brand-new portfolio. We are extremely excited to see the release date coming closer and look forward to teaching many more students and helping them progress in their chosen careers!

Cisco has plans to renew its entire portfolio in February and has been working with partners, including ourselves, to complete the task within the next month – an exciting time, with many new possibilities for our clients!

We are looking forward to an exciting New Year and expect to create new innovations to help our students achieve their knowledge goals.

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If you would like to learn more about how NC-Expert can help train you, or your IT team, toward a better future,  contact us TODAY  !

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NC-Expert Blog

Wi-Fi Myth Series - Myth #12: Auto Channel Selection ALWAYS Knows Best

By Rie Morgan • August 28, 2026
Automatic Channel Selection sounds like one of those features we should simply be able to trust: the APs monitor the RF environment, the Controller gathers data, an Algorithm considers interference, utilization, neighboring APs, channel availability, and other metrics, then Radio Resource Management (RRM) does its “thing” and selects the best channels. Wonderful! One less problem for the wireless engineer to worry about... except RF rarely cooperates with anything quite that neatly! Modern RRM systems are remarkably capable, and automatic channel selection can dramatically simplify the management of large wireless environments, but an algorithm can only make decisions based on the information it collects, the parameters it has been given, and the objectives it has been designed to optimize. That makes automation a powerful engineering tool. It does not make it the engineer.

Wi-Fi Myth Series - Myth #11: Interference Is Always Someone Else’s Wi-Fi

By Rie Morgan • August 20, 2026
When Wi-Fi performance suddenly deteriorates, interference is often the first culprit to be suspected and, when this (interference) enters the conversation, attention tends to turn immediately toward neighboring Wi-Fi networks. “Someone must have installed another AP.” “The office next door is probably using our channel.” “There are too many SSIDs around here.” Sometimes, this diagnosis is exactly right, but RF interference has a much larger cast of characters than just neighboring APs. In fact, some of the most frustrating wireless problems occur when the interfering device isn’t speaking 802.11 at all! The spectrum doesn’t particularly care whether the energy occupying it came from an enterprise AP, a Bluetooth headset, a microwave oven, or something considerably stranger. To a Wi-Fi radio trying to communicate, unwanted RF energy is simply unwanted RF energy. Wi-Fi Has to Share the Neighborhood The 2.4 GHz band has always been something of an RF “community center”. Wi-Fi operates alongside Bluetooth, Zigbee and other technologies, while various consumer, industrial, medical, and electronic devices may also generate energy within or around the same spectrum. Microwave ovens are perhaps the most famous example. Their emissions can interfere with 2.4 GHz Wi-Fi, particularly when clients are operating nearby. Bluetooth devices, cordless equipment, wireless cameras, sensors, and other transmitters can also contribute RF energy. Some interferers transmit continuously. Others appear periodically. Some hop frequencies. Others produce wideband noise. That last category can be particularly entertaining to troubleshoot... in the very specific sense of “entertaining” that wireless engineers use when they have been staring at spectrum analysis for three hours! The important point is that interference doesn’t need to understand Wi-Fi to disrupt it.

Wi-Fi Myth Series - Myth #10: The AP Is Up, So the Wi-Fi Must Be Fine

By Rie Morgan • August 13, 2026
There is something wonderfully reassuring about seeing a row of green APs on a wireless dashboard: APs connected; radios operational; no obvious alarms; everything green. Excellent! The Wi-Fi must be fine... Except, of course, the users are complaining that Teams calls are breaking up, handheld scanners keep disconnecting, authentication takes forever, and someone in Accounting has discovered that turning Wi-Fi off and back on again temporarily fixes everything. Welcome to one of the more persistent myths in enterprise wireless: if the AP is up, the Wi-Fi must be working. An operational AP tells us something useful... but it tells us surprisingly little about the experience of the clients actually using the network. “Up” is an Infrastructure State When a monitoring platform reports that an AP is up, it usually means the infrastructure can communicate with it. It tells us: - the AP has power - its Ethernet connection is functioning - it may have established its management or CAPWAP connection - its radios are probably operational - it hasn't disappeared into the networking equivalent of a “black hole” ...all good things. But none of those things proves that a client can successfully use an application. Consider what still has to happen after the AP proudly announces its existence. A client must: discover the WLAN associate authenticate obtain the appropriate network configuration reach its default gateway resolve DNS access the required network resources, and maintain sufficient RF performance to exchange data reliably. Depending on the environment, that journey may involve: 802.1X RADIUS DHCP DNS VLANs ACLs firewalls roaming mechanisms upstream switching WAN connectivity cloud services ...and several other systems waiting for their opportunity to make your afternoon more “interesting”. ;-) The AP actually being operational is merely one part of that chain!