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Adapter Mac

December 4th, 2005

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How does this work, exactly..? - Wireless card (times two) in my laptop..?

..
..
Having used a PCMCIA wireless g network card for some time now, I picked up and internal wireless g mini PCI card..

I had to connect via the PCMCIA card to go online to find the drivers for the internal card.. Once installed, both cards were connected to the wireless hub.. BUT - my internet access speed is at least 3 times faster than just PCMCIA card alone..

Can both cards be communicating data, simultaneously.?

How can my internet speed have increased so dramatically, when my ISP is giving a maximum speed of only 8Mb/s. and the cards are already running at 54Mb/s (each)..?

Logically, one card alone (54Mb/s) is transferring data, faster than the net connection can provide, so how does two cards make such a vast difference.?

If I remove the PCMCIA card, the internet performance drops quite significantly, so it would seem that two cards are better than one..

So, How does it work..?

Two cards are not better than one.

The 54Mb is internal network transfer, so, 2 computers transferring files on the same local area network will do so at the slowest speed card. If 1 is G and the other B then your transfer speed would be a theoretical 11Mb. If 2 G cards, then theoretical 54Mb.

But two in 1 computer? No - the requests to the net will go out one OR the other adapter (MAC address) and come back to that same MAC address. The MAC address is part of the round trip addressing in the packets.

The ISP speed of 8Mb is the theoretical maximum transfer rate going into and out of your modem/router. That's where the bottle neck is on all the internet speed questions.

If you feel you are getting better performance using 2 cards, then by all means continue.

Good Luck

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