Re: Ethernet Hub question

From: James R. Jones (okieman7_at_cableone.net)
Date: 02/19/05 

Date: Fri, 18 Feb 2005 21:12:51 -0600

ray wrote:
> On Fri, 18 Feb 2005 22:15:35 +0100, Jafar wrote:
>
>>Hi,
>>At the moment, I have 2 NICs inside my server.
>>eth0 is connected to a laptop.
>>eth1 is connected to the ADSL modem.
>>
>>Soon I will have a 3rd PC so instead of shoving another NIC inside the
>>server I was thinking about getting a hub.
>>I assume it's just a simple matter of plugging the hub into eth0 and it
>>will act just like a multi port extension?
>>Is there more to getting a hub going than just plugging it in?
>>Also, what kind of cables do I need? Do I still need crossover cables
>>anywhere or will standard cables be ok?
>>Many thanks.
>
> Better to get a switch. You'll find a 4 port switch quite affordable. I
> should think you could plug the switch into the modem and then just plug
> all the computers into the switch. It's a straightforward exercise - just
> plug it in. You would use straight thru (not crossover) cables everywhere,
> although I think some switches may allow the use of either cables. As I
> understand the difference is that a switch allows any connection to use
> full bandwidth when it needs it while a router splits up the bandwidth -
> someone please correct if that is not right. I believe a switch is usually
> cheaper, too.
>
If the DSL modem only allows one IP address then only the server or the
laptop or the 3rd computer will operate. The other 2 will not be able to
  obtain an IP address. A router on the other hand will take the 1
Public IP address that the Modem hands out and translate it into 3 or
more addresses, this is called NAT (Network Address Translation). A
wireless router will allow combinations of wireless and hard wired
machines so is even more flexible. Either type of router helps with
network security as the one public address that the modem hands out is
translated into up to 256 possible private addresses these addresses are
not normally seen by the internet thus are quite hard to hack.

Hope that helps
Jim

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