Hi Pete,

On Saturday 22 July 2006 22:34, Pete Holsberg Inscribed Thus:
> Rich Koziol typed the following on 7/22/2006 2:28 PM:
> > On 22 Jul 2006 at 14:09, Pete Holsberg wrote:

> >> What does that actually mean? Aren't all the PCs behind a
> >> firewall, and doesn't each have a unique IP address that is
> >> not ordinarily visible on the Net?

Yes !  Called "Private Addresses"

> > All your PC's will have the same IP on the Internet side of
> > the Router.

No !  Only the router will be assigned a public address ! 

:GOTO Bottom:

> > On the LAN they will be unique, and you can 
> > change them if you want to.

Yes !  You can let DHCP assign addresses or you can give each machine a 
static one !  Its easier to let DHCP do the work !

> Isn't it the router (or cable/DSL modem) that gets the Internet
> side IP address?

Yes !

> I don't understand how two computers on the 
> Internet can have the same IP address.

They can't !  Or rather they shouldn't have !  On the internal network 
they can't either !  If that happened the machines would become 
invisible, nothing would be able to talk to them ! 

:Bottom:
The router will have a DHCP server that dishes out private addresses to 
the machines on the internal network.  It will also map each address in 
such a way that it can direct traffic to and from the correct machine.  
This mechanism is called NAT. 

-- 
Best Regards:
     Derrick.
     Pontefract Linux Users Group.
     plug at play-net.co.uk

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