Signal, noise and rate data from router?
I understand how to interpret signal and noise from a previous posting (http://discussions.apple.com/thread.jspa?messageID=7190784�), however, I am not clear as to what the rate data means (this data can be obtained by clicking on Wireless Clients in the Summary Tab of Airport in the Airport Utility)? Can anyone enlighten me.
Thanks
Tony
There are two measures used (& sometimes mixed up) when it comes to wireless network speed. They are: bandwidth & throughput (data transfer rate).
Both are measured in MBps or Mbps (Megabytes vs Megabits per second). Bandwidth is the maximum speed the wireless media can carry. Obviously the higher the bandwidth the greater the speed that can be obtained. The 802.11 standards typically are stated in bandwidth. For example, 802.11g has a bandwidth of 54 Mbps; 802.11n has a range between 150 & 300 Mbps, depending on which radio band (2.4 or 5 GHz) is being used.
The other measure, throughput, is the more "realistic" measure as it takes into account the effects of RF properties and Wi-Fi interference in the real world.
Think of bandwidth as a road. 802.11b would be a rural route, 802.11g a city highway, and 802.11n, the AutoBahn. Now think of throughput as the impact of the number of vehicles on any of those roads and the current road conditions. Just because you can drive a Porsche on the AutoBahn at its maximum speed, doesn't mean it will be able to obtain it.
Long story, short, the "rate data" values you see in the AirPort Utility reflect throughput speeds.
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Regards
Amit
Edited by: amit_sap_n on Jul 20, 2011 1:54 PM -
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