Thanks,  to Tim and Daniel for the explanations. Still a little confused but 
will get there eventually.

Matt

On 25/11/2010, at 10:39 PM, Daniel Kerr wrote:

> 
> Hi Matt
> 
> Just to add to Tim's useful explanation, I was trying to find the listing for 
> speeds,..but this little "cheat" will help:-
> <http://www.ice.mtu.edu/~jamyles/references/speeds.html>
> 
> Just to give you a quick idea.
> 
> If you were transferring it across WiFi and assuming the slowest computer has 
> WiFI 802.11b/g then it will be running at about 54 Mbps / 11 Mbps
> If you transferred it via Ethernet cable then you'd be working at about 100 
> Mbps
> And if you decided to do it via Firewire400 it would be about 400 Mbps
> Just for fun, mix in USB1.....  - 12 Mbps
> 
> Of course, there are lots of other factors that affect this as well, but you 
> can see why if you have a bit of data to transfer WiFi sometimes isn't always 
> the best way. It's better to transfer it via Ethernet or if you've got a 
> Firewire drive around, drop it onto that, then plug it into the iMac and 
> throw it on there. You'd be down in half the time,...even counting unplugging 
> and walking :o)
> 
> Hope that helps,... and gives you a bit of a rough idea. :o)
> 
> Kind Regards
> Daniel
> 
> 
> On 25/11/2010, at 10:11 PM, Tim Law wrote:
> 
>> 
>> Hi Matt,
>> 
>> I think you are confusing two technologies.
>> 
>> What I imagine you have had installed is a device to connect you to the 
>> internet using Telstra as you Internet Service Provider.
>> There is one connection, a copper phone line, or a coaxial cable, or a 
>> wireless connection to the internet. 
>> This is your internet connection. Do not think about this again for the rest 
>> of the description!
>> 
>> 
>> The box that this external internet connection is connected to is called a 
>> router. 
>> It may have several ethernet ports on the back.
>> It may have a couple of little antenna sticking up. These are called your 
>> WiFi connections. I'm sure WiFi is short for something, I can't recall. 
>> Both these will allow - all other things being equal - for anything 
>> connected to either the ethernet ports or the little antennas to connect or 
>> talk to each other and files can be transferred. This is your home network. 
>> It has WiFi and ethernet cable connections and can be extended all over the 
>> place, but has nothing to do with the internet. 
>> 
>> When you transfer something from one computer to the other, you are 
>> generally using your home network. From your description this is what you 
>> have done. 
>> When you send an email or use an internet browser, you are going to use the 
>> internet - that other thing I told you to forget about.  :-)
>> 
>> Your router will work fine without a connection to the internet, you just 
>> won't be able to send emails or browse the internet. 
>> They are two distinct technologies. 
>> 
>> I trust this is useful.
>> 
>> Tim
>> 
>> 
>> On 25/11/2010, at 10:52 AM, Matt Falvey wrote:
>> 
>>> 
>>> Hi all, I have a problem understanding WiFi and thought I am going to look 
>>> a little silly asking this question but then that is my forte.
>>> 
>>> I have just installed WiFi with Telstra.  All the Mac's are linked to it 
>>> via WiFi so they can access the net.  The other day I downloaded a game for 
>>> daughter onto my iMac. As the game was 5.3GB, I couldn't burn it to a DVD, 
>>> nor did I have an SD card or Thumbdrive big enough to transfer it to her 
>>> iMac.  So I went to the finder and connected to her iMac and sent it to her 
>>> desktop.  The only thing it took just short of an hour! 
>>> 
>>> As this was happening I had time to ask myself, Why.  Now I am asking you?  
>>> As I couldn't answer it specifically, though I have my fears, - Have I sent 
>>> this via Telstra? - Not from iMac to iMac but via WiFi uploaded to Bigpond 
>>> and downloaded to Hannah's iMac?
>>> 
>>> So I am asking in effect is even though we all have WiFi capable Macs, to 
>>> talk to each other via WiFi we have to go through a connection by WiFi to 
>>> Telstra/Bigpond, as we are not connected to ourselves, "in home"? Is that 
>>> right?  
>>> 
>>> If the above is correct can I configure the Macs to talk to themselves via 
>>> WiFi?  (I realise I could have connected the two up via a firewire cable 
>>> and done it that way, but I thought we were all WiFi) 
>>> 
>>> Thanks from a very confused.
>>> 
>>> Matt  
>>> 
>>> 
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>> 
>> 
>> 
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> 
> ---
> Daniel Kerr
> MacWizardry
> 
> Phone: 0414 795 960
> Email: <dan...@macwizardry.com.au>
> Web:   <http://www.macwizardry.com.au>
> 
> 
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