Connect802 is a nationwide wireless data equipment reseller providing system design consulting, equipment configuration, and installation services.


CSS Mega Menu Css3Menu.com

 

 

March 1, 2007

Essential Wi-Fi:
For those who are new to Wi-Fi networking...
 
Technology and Engineering:
For the engineer and Wi-Fi network administrator...
 

Ask the Expert
Questions from our readers...

To Infinity... and Beyond!
News from the wireless marketplace...
 

Essential Wi-Fi

 

A PING scan reveals that the access points are incorrectly allowing wireless clients to detect the presence of all other wireless clients.
[CLICK ON THE IMAGE FOR A LARGER VIEW]
   
 

Under Windows, clicking on My Network Places brings up a list of all shared resources that can be accessed. In this case, every wireless user's shared files were immediately visible.
[CLICK ON THE IMAGE FOR A LARGER VIEW]
   
 

Judy's shared files, including a complete set of QuickBooks financial data. Judy is at risk of becoming a victim of identity theft or, worse, having her bank accounts cleaned out by a criminal.
[CLICK ON THE IMAGE FOR A LARGER VIEW]

 Technology and Engineering

With a broadcast-type medium like television or radio, only the transmitter’s power matters, since the receiver only needs to listen, not talk. The range of this type of medium can be increased simply by increasing the output power of the transmitter. But 802.11 is not a broadcast-type medium. It is bi-directional. Client devices talk to access points and access points talk back. Therefore, the range of an 802.11 link is limited by the weakest of the two transmitters at the ends of the link. This principle is known as the Unbalanced Power Effect (UPE).

An illustration of the UPE Zone, with specific distances
based on difference in output power.
 

Ask the Expert

Connect802 sells a full range of wireless connectivity products, including a vendor-neutral wireless repeater.

To Infinity... and Beyond!

Pew Internet Project Reports Wireless Use Up

Read the whole report

At Connect802 we're your PAGE ONE resource for wireless networking!