Important CCIE Update

Cisco CCIE Training Update

This is a special notification for NC-Expert’s CCIE Candidates.

We have learned from Cisco that it expects to refresh its entire portfolio in February 2020.

We strongly urge all CCIE Candidates to prepare to complete their studies and sit their respective lab exams by the end of 2019, latest.

We understand that there will be limited opportunity for Candidates to sit lab exams in the early weeks of 2020, however these seats will be severely limited.

For candidates anticipating completing their studies, please contact us at your earliest convenience so we can conclude our part in your training.

NC-Expert cannot be held liable if Candidates choose to delay completion of their training because, at this time, Cisco has provided no information about its continued instructor-led offerings.

As a result, NC-Expert cannot confirm that it will be able to continue to offer Cisco’s own instructor-led CCIE training after February 2020.

The post Important CCIE Update appeared first on NC Expert.

NC-Expert Blog

Wi-Fi Myth Series - Myth #13: Mesh is ALWAYS The Best Solution

By Rie Morgan • September 10, 2026
Mesh Wi-Fi has developed quite the reputation: Need coverage in the far end of the building? Mesh. Can’t get Ethernet to an access point? Mesh. Dead spot upstairs? Mesh. Need Wi-Fi in the warehouse, courtyard, annex, garage, loading dock, or that mysterious conference room where RF signals apparently go to die? Mesh. And there’s a reason for the enthusiasm. Mesh networking can be extremely useful: it can extend connectivity into places where running cable is difficult, expensive, disruptive, or simply impossible. Modern mesh systems can dynamically select paths, recover from connectivity changes, and provide remarkably capable wireless backhaul... but that doesn’t mean mesh is automatically the best architecture. Sometimes the best mesh network is the one you don’t build!

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.