Re: On connecting to the Internet

From: David (davidwnh_at_adelphia.net)
Date: 10/08/03 

Date: Wed, 08 Oct 2003 13:41:49 GMT

Its all laid out in RFC 1256 for the router discovery protocol.
Here's a good link with a short explanation for the layman:
http://www.networkcomputing.com/netdesign/1107icmp7.html?ls=NCJS_1107bt

If you have the proper gateway address entered into the dial up connection's
configuration you can probably filter these packet's with no adverse
affects.

Multicasting is not just for client applications to send IM or video
streams, etc to groups. It is simply an addressing scheme that is more
efficient than using unicast or broadcast addresses for certain things. So
in your example when the OS is looking to update it's routing
table(generally when you first initialize a network connection or if a
router in your table doesn't seem to be responding) instead of using a
broadcast address to look for local routers, it uses an address that
specifically pertains to "all routers on the local subnet".

So the real time networking role is simply that your machine has to know
which router to use to send traffic whose destination is outside of the
local subnet.
> OK. What real-time networking role would cause a stand-alone dialup
> box to need to do this query?
>
> Like, the only protocol used here is tcp. No ipx/spx, no netbios, no
> netware and none of the rest.
> Has it got anything to do with messaging or uploading ?
>
> regards
> >
>

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