cshih16@yahoo.com hath wroth:

>1. The salesman recommended me to get both AP and Client in 54Mbps
>instead of 108Mbps because he found that the internet connection is
>just 1Mbps why get 108Mbps. Is it true?

Yes. If you can get a 108Mbit/sec connection, you will get perhaps
50Mbits/sec TCP thruput. If you are sharing a DSL or cable modem
connection, you only need perhaps 1 to 6Mbits/sec thruput. Any more
is largely wasted.

Also, wireless speed and range are inversely related. Under ideal
circumstances and with the stock antennas, you might be able to
maintain a 108Mbit/sec connection at a range of about 6ft. At
54Mbits/sec, you can probably go 20ft. Any farther, and your access
point will slow down the connection to compensate for deteriorating
signal to noise ratio.

>My PC shows 100Mbps connection
>speed though.

Nope. That's the connection speed. Your thruput is somewhat less
depending on from where you're measuring. The speed between your
computer and a similar computer over a 100baseTX-FDX connection will
yield perhaps 80Mbits/sec. However, your speed downloading from the
internet through a 1.5Mbit/sec DSL connection, will be only
1.5Mbits/sec.

>After setting up AP and Client in 54Mbps.. can my three
>computers still have 100Mbps connection speed?

Nope. I assume you mean computer to computer communications as in a
game network. If your other two computers are connected via a wired
100baseTX-FDX connection, and you get a 54Mbit/sec wireless
connection, you'll get about 25Mbits/sec thruput (as limited by the
wireless connection).

However, if you have TWO computers connected via wireless (using an
access point), and each is connected at 54Mbits/sec, then you'll get
only 12.5Mbits/sec maximum thruput. That's because only one
transmitter can be on at a time and each of the 3 radios (two clients
and an access point) have to wait for the others to shut up.

>2. Can my two exisitng computers still connect to the ports in Access
>Point via their original cables/wires, and just have the third PC go
>wireless (USB Adapter)? Is this idea workable?
>[2 pc's with cable connection and 1 pc with wireless connection?]

No problem. It should work as you expect. 802.11 wireless is nothing
more than an ethernet extension cord. Anything you can shovel down
the ethernet will also go through 802.11 wireless. More specifically,
802.11 wireless packets encapsulate 802.3 ethernet packets. End to
end, it's just like ethernet.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558