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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 next to the access point. […]

Wireless Optimization Tips!

 I have taken into account for a general hospital system where “patient tracking” application is used by doctors and nurses to capture/update patience information.  Patients/Visitors use wireless for their private use along with other hospital staff using wireless network for their day to day work chores. In some instances there might be IoT devices which might include patience monitoring devices/beds […]

Post Deployment Wireless Site Survey

A few days ago I conducted a wireless site survey for a Warehouse for a coffee trading company in Auckland. The motivation behind this was due to the some poor signal reports and coverage in some aisles. The list below summarises the key findings: Good overall coverage of signal especially around the corners and in the small office areas. Survey […]

Wi-Fi Validation! 21 Things!

I have pen down 21 things that came to me when it comes to verifying the existing wireless validation, let’s go through them one by one. Existing Wireless – Confirm issues and problem areas. Nature of problem, impacting the type of devices, users etc? This can be done over email or call not necessary to be onsite. Post new implementation […]

Wireless Site Survey of my home!

I have conducted my first ekahau site survey for my home and it has helped me learn a few basic things about accomplishing the site survey. Need the site plan (evacuation map or a dwg file of the site is recommended. Calculate the dimensions of the building or the facility, can use google maps for reference if details are not […]

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 places. There is a two way packet exchange. It is not the secure way to setup the wireless. PSK / WPA/WPA2 […]

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 four data rates viz. 1 Mbps, 2 Mbps, 5.5 Mbps and 11 Mbps. – DSSS is used to provide support […]

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 deliver information. One of the original ones we’ve come across is FHSS (Frequency Hopping Spread Spectrum) and DSSS (Distributed Sequence […]

Packeth – Ethernet Packet Generator

I came across this interesting tool yesterday which helps in generating traffic/sequence of packets on the ethernet.  It is primarily Linux based tool but is supported on Windows/Mac. Haven’t got much luck with Windows but Linux version works well. More info can be found here – http://packeth.sourceforge.net/packeth/Home.html You can create and send any ethernet packet. Supported protocols: •ethernet II, ethernet […]

Change control and why it may save you!

Change control is an important part of ITIL and any organized form of business. It is the source and essence of the day to day tasks and it encompasses the same logging that used to be done in early days which is now a days replaced by online/computer format change control. Change control also gives a scope to peer review […]