Friday, February 10, 2012
Wireless/Mobile
Error 404--Not Found |
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:10.4.5 404 Not FoundThe server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent. If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address. |
WLAN resource: RF power values
Cisco has a helpful online document on radio frequency power values for wireless LAN radios and antennas.
The document defines RF power levels, the most common measure of them , the decibel (dB). "This information can be very useful when you troubleshoot intermittent connectivity," according to the paper.
For me, one of the handiest sections shows the dB equivalents in miliWatts and Watts for radios. dB ratings in the mid-to-upper teens cover the miliWatt power levels of the typical enterrprise access point (32-64mW). dB ratings in the 20's reflect mW ratings of 100+.
The document also has a link to an Outdoor [Wireless] Bridge Range calculator(an Excel spreadsheet), links to a variety of product-based online forums, and to other Cisco online wireless resources.
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