On 3/4/10 2:23 PM, John Carmonne wrote:
UpDate This is what I found and why I stated that the AirPort and
AirMac b cards are slower. Also all these machines are in the same
700 SFT condo, no pipes or such. However I should've also stated that
I choose the Gigabit wireless more for file transfer than browsers.
Notice there's not much help for upload probably an FCC thing to keep
the licensee's pockets heavier.
Upload is usually slower because people want (or are perceived to want)
far more download capacity than upload. Early DSL was SDSL or Symmetric
DSL, Upload speed equals download speed.
Time Warner cable Turbo " Talladega Fast" for the car
analogies . Notice the USB 1.1 speeds with the nDongle compared to
the USB 2.0 port.
Very interesting, here is a run down of what I found using
Speakeasy.
The USB dongle is a hot item very easy to use, all you need is one
in your pocket.
NetGear RangeMax WNR854T Ethernet 1000 wireless
802.11n/g no b Cable modem Time Warner RoadRunner
Talladega Fast
TiBook 500 802.11g Sonnet DN=13682 UP=1823
USBn dongle in USB 1.1 port DN= 3666 UP= 1810
G4 CUBE 500
USBn dongle in USB 1.1 port DN= 3666 UP= 1810
AirMac DN=5060 Up=1707
MBP 2.4 ETH 1000 DN=24908 UP=1892
AirPortExtreme n DN= 24282 UP= 1902
PM G5 2.7 dual Eth 1000 DN=29278 UP=1872
USBn dongle in USB 2.0 port DN= 31169 UP= 1900
G4 MDD 1.0 dual Eth 1000 DN=29278 UP=1872
USBn dongle in USB 2.0 port DN= 31107 UP= 1881
G3 iMac 700l Eth 100 DN=10044 UP=11841
USBn dongle in USB 1.1 port DN=3 774 UP= 1797
AirPort DN=3639 UP=1576
I see Airport and AirMac (I don't know what AirMac is) getting about he
same performance as a USB dongle via USB 1.1 and they have about the
same bandwidth limit.
Don't forget that 802.11b has a MAXIMUM speed of 11 Mb/s. But there are
a number of other speeds it can operate at depending on conditions. And
that isn't including slowdowns due to packet loss. You need to check to
see just what the data rate is. 802.11 is half duplex so what ever
speed you are getting, acknowledgments are taking up some of that
bandwidth as well as dead time while the computer is thinking about the
data.
My experience with 802.11b has almost always been good. I've never
measured the speed but it's usually what should be expected.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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