From: Asim Khan (asimmegawatt@xxxxxxxxx)
Date: Sun Jul 21 2002 - 06:54:37 GMT-3
Tom,
The decision when to use Cross and when to use
straight cable depends upon the interface type. By
defualt all the interfaces are grouped in two classes;
MDI (media dependent interface) and MDI-X (media
dependent interface-Crossover i.e internally crossed).
All the end devices have MDI interfaces like Routers,
Computers, Firewalls etc. Whereas all the intermediate
devices have MDI-X interfaces like Switches and Hubs.
So when you connect two MDI interfaces you will have
to use Cross cable. Similarly between MDI and MDI-X
interfaces you have to use Straight and between two
MDI-X interfaces you have to use Cross. So from above
discussion we conclude
Computer to Router ----> Cross Cable
Router to Router ----> Cross Cable
Computer to Computer -----> Cross Cable
Computer to Switch/Hub---> Straight Cable
Router to Switch/Hub ----> Stright Cable
Switch to Switch -----> Cross Cable
Remember on some Hubs we have uplink port which can be
changed from MDI to MDI-X and vice versa through the
toggle switch located near the uplink port.
Hope this helps.
Asim Khan
--- Tom Young <gitsyoung@yahoo.co.jp> wrote:
> Hi, group
>
> A very simple question ,may I use crossover cable
> to
> connect a computer to router's ethernet port
> directly?Certainly I will set the port address and
> computer's address in one subnet.
>
> Thanks
>
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