My Notes from chapter 5 of the CWNA study guide Original IEEE 802.11 standard The first WLAN standard published. Defined by IEEE at the Physical and MAC layers of the OSI model. The PHY task group worked in conjunction with the MAC task group to define the original 802.11 standard. The PHY task group defined …
CWNA Chapter 4 – Radio Frequency Signal and Antenna Concepts
My Notes from chapter 4 of the CWNA study guide Azimuth and Elevation Charts (Antenna Radiation Envelopes) In either chart, the antenna is placed at the centre of the chart. Azimuth chart = H-plane = top-down view Elevation chart = E-plane = side view Interpreting Polar Charts Represent the decibel (dB) mapping of the antenna …
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7 Signal Wireless Monitoring System
After watching a webinar on the 7 Signal wireless sensors, I was offered the opportunity to for a loan sensor to conduct a POC to see if the solution would be beneficial for the company I am working for. Aside from evaluating the solution for the company, I took the opportunity to learn about a …
GPS Coordinates for CMX
I have been looking at how to link CMX location data to other systems, and through the use of GPS Coordinates I can link the map in CMX to a CMX on Google Earth for instance. This post is to detail the steps to get GPS coordinates for device locations to appear within CMX. One …
My Site Survey Kit
I thought I would share my site survey kit with you. My survey Kit is made up of the following: A Power Source: AP Stand Surface Pro 4 with Ekahau Site Survey software installed USB powered USB Hub (as the surface only has single USB port) Ekahau Spectrum Analyser Fluke Aircheck Random UTP and Power …
CWNA Chapter 3 – Radio Frequency Components, Measurements, and Mathematics
My Notes from chapter 3 of the CWNA study guide RF Components Transmitters Initial component in the creation of wireless medium. Transmitters job is to begin the RF communications Transmitter starts AC signal oscillating at the RF frequency Transmitter takes data provided and modifies the AC signal using a Modulation technique Antenna Two functions when …
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WLC Transfer Coredump
After one of my WiSM2's crashed yesterday I had a request from Cisco TAC to supply the coredump from the controller. Whilst attempting to do this I ran into issues utilising TFTP which was due to the fact that my TFTP server didn't support the size of the file I was trying to upload to …
CMX to Splunk Connector
Not long ago I posted about the CMX to Elasticsearch connector that Cisco had released, I have also been able to beta test the CMX to Splunk connector. The steps below show how to configure this connector. I have found both the provided instructions from Cisco and also the usability of Splunk much better than …
Splunk – Install to RHEL 7
As part of testing the CMX to Splunk direct connector I was presented with the requirement to install Splunk. As I had access to a RHEL 7 box I decided to install Splunk onto this box. I would like to give credit to VCP Muthukrishna's blog for helping me learn how to install Splunk. His blog …
CWNA Chapter 2 – Radio Frequency Fundamentals
My Study notes from Chapter 2 of CWNA Study Guide RF Characteristics Wavelength A wavelength is the distance between the two successive crescents (peaks) or two successive throughs (valleys) Frequency Is how often an RF signal cycles in a certain time period Standard measurement of frequency is hertz (Hz). An event that occurs once in …
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THE WLAN 