Great thanks for that, u actually explained it in words i understand :-)
as i said i have just started learning about networking, ive still got
lots to go, but iam getting there slowly, its just stuff like that and
firewalling iam getting really stuck on, i can set one up, but it keeps
knocking off my nis & nfs clients and none of the howto's really explain
how to overcome that on firewalls howto's - oh well back to more
reading..
once again
cheers
On 04 Aug 2001 18:21:44 -0500, Mikkel L. Ellertson wrote:
> On 4 Aug 2001, mark wrote:
>
> > Ive disabled all my gateways (as they are not being used) and iam still
> > getting collisions on the network..
> > Anyone else got any ideas at all please.
> >
> > as 1 minute iam told to expect it with the hardware iam using and the
> > next iam not to expect it
> >
> > just makes me kinda unsure, as iave just started learning about
> > networking and stuff and really need to know if these sort of things a
> > re common or if i havn't set things up correctly
> >
> > Mark
> >
> Mark,
> When ever you are using half-duplex, and hubs, you are going to
> get some collisions. Collisions are when two nics on the network try
> and talk at the same time. When you have computers connected to a hub,
> any trafic that comes in one port is sent out all the ports. A
> collision happens when one NIC starts sending out a messages, and before
> this gets to the other NICs in the system, another NIC starts sending.
> The more computers on the network, and the more trafic on the network,
> the more collisions you get. Hubs can normaly only have one packet
> travling through them at a time.
> When you are using switches instead of hubs, you do not get
> collisions because the switch takes care of it. They do this in two
> ways. First of all, a switch will normaly only send packets out a port
> to the computer(s) connected to that port. (You can have a hub
> connected to a port on a switch, and get more then one computer hooked
> up that way.) They also usualy are operating in the full duplex mode,
> so they can send packets to a NIC at the same time the NIC is sending
> packets to it. The switch has internel buffers and can have more then
> one packet traveling through it at a time.
> So, with a network connected up to a hug, some collisions are
> normal. It is when they get to be more then a few persent of the total
> trafic that you are having problems.
>
> Mikkel
> --
>
> Do not meddle in the affairs of dragons,
> for you are crunchy and taste good with ketchup.
>
>
>
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