> I am aware the technology exists. THAT might be a good choice. I simply
> wish to stay away from wireless, from a security issue, yet wish to connect
> four or five PC's or an occasional laptop via wired circuit to share
> broadband internet (cable modem).
Odd that you're asking in a wireless newsgroup!
> Who are the vendors? are there many to choose from? who's is more user
> friendly, and robust.
> What works and what doesn't?
Dunno, never used them myself but Google helps
http://www.google.co.uk/search?hl=en...tworking&meta=
> do i need router? switch?
Don't know, what do you already have that connects you to the Internet?
All that the powerline network dongles will do is save you running a
piece of wire so if you have a couple of machines upstairs then a small
switch and likewise downstairs unless the router there already has a few
ports spare. If not, another switch downstairs.
> (which could connect via wire) to "black box" that allows access to my cable
> modem/port.
If you just have a cable modem right now, then you'll need a cable
router (or any router that provides NAT to the LAN side).
So you'll go:-
[Cable modem]--[switch]--[powerline]-------[powerline]--[switch]
The left hand switch is optional depending on how many ports there are
on the router.
David.