Category: CWNA

CWNA exam related stuff

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…

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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…

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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…

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CWNA, Authentication & Encryption Types

Different Authentication types Open PSK 802.1X Open Authentication – There is no authentication (Free for all). Device connects to wireless network without any issue.  Open Authentication might also redirect to a captive portal like at a Airport or Public Wireless…

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CWNA – CCK,DSSS, FHSS & OFDM

CCK – Complementary Code KeyingDSSS – Direct Sequence Spread Spectrum OFDM – Orthogonal Frequency Divisional MultiplexingFHSS – Frequency Hopping Spread Spectrum There are various versions of WLAN standard developed to address different data rate and coverage requirements. IEEE 802.11b supports…

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CWNA , IEEE 802.11!

Hi IEEE 802.11 Key Concepts Let’s get started with the IEEE 802.11 Journey synopsis. Standards are defined at physical and mac-sub layer(data-link). We are referring to different ways of transmitting data over the air. Also how our communication signal would…

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Wave Length and Frequency Basics

Wave Length – is the distance between 2 successive crests (peaks). Commonly, lower frequency signal will travel farther than higher frequency. 2.4GHz – 4.82 inches (12.24 cms), 5GHz – 2.04 inches (5.19 cms) Frequency – Peaks of signal, seen over…

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CWNA : New Things Learnt today

Cinemas jamming mobile phone signals #cinemajammers The US’s National Association of Theater Owners wants the FCC’s permission to block mobile reception inside cinemas. To be honest I thought this already happened in some places… maybe I’d mentally linked it to…

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