Key 802.11 Frames – CWAP#3

This post covers the important 802.11 Frames which can help in performing the analysis and troubleshoot any issues related to WLAN networks. I have referenced Wireshark filters for the ease of each frame. Beacon (1000, Subtype : 8) (wlan.fc.type_subtype == 0x08) Used to announce the Basic Service Set (BSS) for the Client (STAs). Transmitted by…

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How did I Decipher 802.11 Frames! #CWAP-2

Main Objective: To successfully transfer every bit of information(data) from one device to another. 802.11 MAC HEADER Let us now go through the basics of the frame header and the components. I have captured a simple beacon (management) frame using Wireshark. I will briefly explain each of the fields. Notice the number in the bracket…

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CWAP 403 – Start >

I will be summarising each chapter on the Certitrek Publishing – Official Study Guide for CWAP 403 Exam. I’ve learned plenty of concepts from the first chapter – 802.11 – The Protocol. This is one of the chapters which you have to read and learn. One may not learn the contents of this chapter directly…

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CWNA Certification Journey

I managed to get my CWNA certification today, this was my 2nd attempt. The first attempt was a failure a few months ago. Failed Attempt: 53% Passed Attempt: 82% Below are a few tips which I would like to share so that you get most for this certification. It would be quite beneficial if you…

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QoS Overview

Wireless has somehow made it to the human needs pyramid and has become mission-critical for most of the business around the world. Proper RF and QoS design is the only way to ensure real-time apps have acceptable QoE (Quality of Experience). The wireless environments are half duplex shared medium they are quite susceptible to collisions….

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CWNA – Chapter 2 Summary & Exam Essentials

CWNA Chapter 2 – IEEE 802.11 Standards and Amendments. “Defined” means the amendment either no longer exists or it was rolled into the existing (or prior versions) 802.11-2007 spec. “Defines” means it is a ratified amendment that will be rolled into 802.11-2011. “Will define” means it is a work in progress and not yet amended….

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CWNA – Chapter 1 Summary & Exam Essentials

Overview of Wireless Standards, Organisations and Fundamentals. 4 Key organisations involved with wireless networking industry – FCC and other regulatory domains (ITU-R (ACMA (Australia)) (ARIB(Japan)) – FCC regulates communication from/to/within US. Both licensed and unlicensed communications are typically regulated in the following 5 areas  – Frequency, Bandwidth, Maximum power of the intentional radiator (IR),  Maximum…

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Cisco – Mobility Express Experience

A couple of days ago I bumped into an opportunity to setup Cisco Mobility Express for one of the clients. Cisco has enabled to accomplish a mobility solution which can hep you deploy wireless LAN networks and be able to manage WLAN with APs on the network acting as the controller. Here’s how Cisco describes…

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Everything I know about 5G!

5G is 5th Generation of Wireless Technology. 5G is Software defined network. 10x faster than 4G, 2hour film – 3G – 26 hours, 4G – 6hours, 5G – around 4 seconds. Response times faster – 4G – 0.045 m/s, 5G – 0.01 m/s. Foundation for ViR, IoT, Autonomous Driving, Online Gaming is just a start….

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WiFi Metrics

I am going to pen down a few of the important wireless metrics. This is to access the environment for any concerns and issues raised around the wireless side of things. So what should we consider a good, acceptable, or poor Wi-Fi signal strength? -30 dBm – Maximum signal strength, you are probably standing right…

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