802.11 Wave Rider

Friday, October 25, 2019

Authentication and Key Management (AKM) & PSK Authentication

October 25, 2019

In the previous blogs, we have mentioned about Robust Security Network (RSN) that was being defined in 802.11i amendment. RSN now also being part of the 802.11-2012 standard. Robust security network association (RSNA) requires 802.11 stations to have process for dynamic encryptions keys creation after the authentication and...

Wednesday, October 16, 2019

Authentication Series - Open System Authentication

October 16, 2019

In this series of WLAN security blogs, we will understand different types of authentication methods and the steps required for a client station to connect to the 802.11 BSS. The first one is Open System Authentication. It is one of the legacy WLAN security but the only pre-RSNA...

Wednesday, October 9, 2019

Wireless Authentication and Encryption Overview

October 09, 2019

When it comes to deploying a Wireless LAN, it is very important to deploy secure methods for authentication and encryption so that the network can only be used by those individuals and devices that are validated and authorized. In this series of articles on WLAN security, we will...

Tuesday, October 1, 2019

802.11 State Machine

October 01, 2019

The state of wireless client connectivity is not just having “Connected” or “Disconnected”. When we are doing the troubleshooting on WLAN connectivity issues, it is important for us to see the whole picture and understand different states of client connectivity. We can refer to the 802.11 State Machine...

Tuesday, September 17, 2019

Remote Wireless LAN Packet Captures in Extreme Cloud IQ with CloudShark

September 17, 2019

This blog will cover how we can run a remote packet captures for WLAN through the cloud management platform of Extreme Cloud IQ and Cloudshark.Extreme Cloud IQ support native packet capture and it has integrated with CloudShark. With that, we can initiate a packet capture for the WLAN...

Sunday, September 1, 2019

External Antenna Access Point is better in wireless coverage?

September 01, 2019

External Antenna Access Point is better in wireless coverage? It is often perceived that the access points will provide better wireless coverage or higher transmission strengths if the devices has external antennas rather than built-in internal antennas. This is one of the common customer facing questions when we...

Friday, August 9, 2019

Maximum Transmission Power in WLAN Radio?

August 09, 2019

“What is the maximum Wi-Fi transmission power of your access points or wireless router?” This is one of the common questions I always come across during the first meeting with clients in the RF designing stage. Very often we will hear the answer like 100mW or 20 dBm...

Sunday, July 8, 2018

Performing Spectrum Analysis for troubleshooting

July 08, 2018

We always need to deal with RF interference when it comes to WLANs troubleshooting. Wi-Fi Access Points are generally operating either on 2.4GHz and 5GHz frequency range, however it is not just Wi-Fi who are using these channels. There are some other common electronic devices such as Bluetooth,...

Thursday, January 25, 2018

Using Wireless Diagnostics Utilities in MacOS

January 25, 2018

I met one partner this week and he has asked me for the suggestion of Wi-Fi Analyzer tools for MacBook. In fact, MacOS has the built in Wireless Diagnostics tools that we can use for Wi-Fi Scanning and Packet Capture. See below for the instructions and steps we...

Sunday, January 14, 2018

Wi-Fi Basics & RF Calculation

January 14, 2018

When dealing with RF and Wi-Fi, we will see a lot of different terms like dB, dBi, dBm, RSSI and SNR. It would be super confusing if we do not understand the meaning and difference among these units, not to mention if we need to do the RF...