computer components

Does anyone know the difference between a local bus and a
standard bus in a computer please? I need the answer for
a course I'm doing, and I can't find a proper explanation
anywhere

Secora3

"Secora3" <> wrote in message
news:7ff101c40354$acf17ce0$...
> Does anyone know the difference between a local bus and a
> standard bus in a computer please? I need the answer for
> a course I'm doing, and I can't find a proper explanation
> anywhere

Both local and standard busses connect to your network card. When you
attempt to use a resource on your LAN (local area network), the request is
routed through the local bus, when you attempt to use a resource outside of
your LAN (e.g. via a WAN link, or on the internet), the request is routed
via the standard bus. The NIC (network card) knows where to send the
request, based on which bus it arrived on.
In recent years, to save money, the busses have been combined, and a subnet
mask is often used to determine where to send the request.

HTH, HAND, etc.

Andy Foster

By the way, ever wonder what a BUS is?

Words that everyone uses but no one seems to REALLY
UNDERSTAND, just bug me! Sometimes it works to just
look them up in a regular dictionary. After all, the programmers
or academics who invent these terms usually get them from
SOMEWHERE (and don't get me started on "quark." <grin>)

The word actually derives from the same word as does
the "bus on city streets" which is "AUTOBUS". <grin>

So, what did "autobus" originally mean? "Available everywhere."

The idea is that a "city bus" allows one to get ON OR OFF the
"bus" anywhere on it's past (within reason.)

Same with a computer bus or "bus network" -- every device is
allowed to send or receive all signals. Bus architectures are
frequently referred to a "shared bus" because these bandwidth
is available AND shared by all devices which are connected.

This typically brings up the issue of "access to the bus"....does
a device require permission and must be somehow deal with
collisions.

In an Ethernet, the bus is freely available to all devices and
"collision detection" is use to resend messages that are
corrupted or interrupted due to collisions. (The infamous
CSMA/CD.)

In a computer, "timing" is used to give the CPU (or master)
control of the bus during certain portions of the "clock" beat
or cycle -- and a fixed amount of time is allocated for devices
to respond when their "name" (address usually) is called.

A bus is a lot like a dinner table meeting where anyone can
talk at any time as long as no one else is currently speaking,
and if you interrupt someone else who starts contemporaneously,
you both back off and re-try (after a slightly random amount of
time.)


--
Herb Martin
"Andy Foster" <> wrote in message
news:c2c2qs$1runtb$...
>
> "Secora3" <> wrote in message
> news:7ff101c40354$acf17ce0$...
> > Does anyone know the difference between a local bus and a
> > standard bus in a computer please? I need the answer for
> > a course I'm doing, and I can't find a proper explanation
> > anywhere
>
> Both local and standard busses connect to your network card. When you
> attempt to use a resource on your LAN (local area network), the request is
> routed through the local bus, when you attempt to use a resource outside
of
> your LAN (e.g. via a WAN link, or on the internet), the request is routed
> via the standard bus. The NIC (network card) knows where to send the
> request, based on which bus it arrived on.
> In recent years, to save money, the busses have been combined, and a
subnet
> mask is often used to determine where to send the request.
>
> HTH, HAND, etc.
>
>

Herb Martin