[AccessD] OT: Wireless network (sort of)

Rocky Smolin - Beach Access Software bchacc at san.rr.com
Mon Nov 3 12:18:41 CST 2003


So I just did and IPCONFIG through the dos command and find my IP is
192.168.1.101 and the subnet is 255.255.255.0.

So does my router think I might have as many as 256 machines (or addressable
devices, I guess) connected to IP 192.168.1.101?

Rocky

----- Original Message ----- 
From: "Drew Wutka" <DWUTKA at marlow.com>
To: "'Access Developers discussion and problem solving'"
<accessd at databaseadvisors.com>
Sent: Monday, November 03, 2003 8:08 AM
Subject: RE: [AccessD] OT: Wireless network (sort of)


> Think of a subnet as a neighborhood.  A network neighborhood.  The subnet
> 'mask' is a property in TCP/IP, which tells your machine what IP addresses
> are around it.  It's a bitmask thing.
>
> 192.168.0.1, with a subnet mask of 255.255.255.0 tells the machine that
> 192.168.0.1 through 192.168.0.255 are around it.  If the bit is turned on
in
> the subnet mask, IP Addresses in that subnet must have a matching bit
> (either on or off....), if it's turned off in the subnet, that bit in the
IP
> address can be different.  So 255.255.255.254 for a subnet, is a subnet of
2
> machines.
>
> The reason this is important, is because subnets control how much
> broadcasting and browsing your machine must do, to locate other computers
on
> the network.  A subnet of 255.255.0.0 tells your computer there are 65k
> machines on the subnet, and more then likely you will never find anything,
> because it will eventually give up.  255.255.255.0 tells it there are 256
> (255) computers on the subnet, which it should be able to find just fine.
> However, if you have a smaller network, a smaller subnet speeds up the
> 'searching'.
>
> That leads to what I was talking about earlier...the Gateway (router).
When
> you tell a machine to go to 123.456.789.321, if that IP Address is not on
> the subnet, it doesn't even bother looking, it just sends the request to
the
> gateway IP (router), so the router does the searching.
>
> Drew
>
> -----Original Message-----
> From: Rocky Smolin - Beach Access Software [mailto:bchacc at san.rr.com]
> Sent: Friday, October 31, 2003 6:53 PM
> To: Access Developers discussion and problem solving
> Subject: Re: [AccessD] OT: Wireless network (sort of)
>
>
> O. What's a subnet?  And where do I get one?  And do I want one?
>
> Rocky
>
> ----- Original Message ----- 
> From: "Drew Wutka" <DWUTKA at marlow.com>
> To: "'Access Developers discussion and problem solving'"
> <accessd at databaseadvisors.com>
> Sent: Friday, October 31, 2003 9:20 AM
> Subject: RE: [AccessD] OT: Wireless network (sort of)
>
>
> > Yes, a switch is used to connect computers on the same subnet.  A router
> is
> > used to connect subnets together.  A router is usually also a switch, so
> it
> > can connect computers on the same subnet, AND connect one subnet to
> another.
> >
> > Drew
> >
> > -----Original Message-----
> > From: Rocky Smolin - Beach Access Software [mailto:bchacc at san.rr.com]
> > Sent: Friday, October 31, 2003 9:20 AM
> > To: Access Developers discussion and problem solving
> > Subject: Re: [AccessD] OT: Wireless network (sort of)
> >
> >
> > Is there a difference between a switch and a router?
> >
> > Rocky
> >
> > ----- Original Message ----- 
> > From: "Frank Tanner III" <pctech at mybellybutton.com>
> > To: "Access Developers discussion and problem solving"
> > <accessd at databaseadvisors.com>
> > Sent: Friday, October 31, 2003 6:54 AM
> > Subject: RE: [AccessD] OT: Wireless network (sort of)
> >
> >
> > > I recommend "hardwiring" the IP address of any device
> > > or server connected to your LAN that's not a
> > > workstation and is virtually always on.
> > >
> > > For the price, I would also highly recommend removing
> > > all hubs from your network and using them as
> > > doorstops.  Switches have come way down in price and
> > > have many benifits over hubs.
> > >
> > > Hubs divide the bandwidth across all ports.  Thus if
> > > you have an 8-port 10-BaseT hub, all ports that are
> > > processing data split that 10Mbit.  A switch, each
> > > port gets the fill bandwidth.
> > >
> > > That's not including the security issues inherent with
> > > hubs as they broadcast all available data to all
> > > available ports rather than to the proper destination
> > > port.
> > >
> > > --- John Colby <jcolby at colbyconsulting.com> wrote:
> > > > Yes, you can indeed daisy chain routers and
> > > > SUPPOSEDLY hubs, though I had no
> > > > joy doing that with my old hub.  I am however daisy
> > > > chaining my old 4 port
> > > > router off of my new 4 port wireless router.  The
> > > > newer models even figure
> > > > out what kind of cable you are using, crossover or
> > > > regular.  The biggest
> > > > issue there was that the router was the dhcp server
> > > > so I had to turn off the
> > > > old as a dhcp server and turn on the new.  I also
> > > > hardwired the address of
> > > > the old router to 192.168.1.2.  Daisy Chaining two 4
> > > > port routers isn't a
> > > > panacea however since you now end up using two ports
> > > > just for the daisy
> > > > chain and have 6 left.  In my case though I also
> > > > have a wireless so I can
> > > > get my laptop in through that and could also get
> > > > other computers in if
> > > > needed.
> > > >
> > > > I have an old model I TIVO which I modded to use the
> > > > internet to "call in"
> > > > for programming.  I had to snake a cable down the
> > > > wall from the living room
> > > > (luckily exactly over my office in the basement).  I
> > > > understand that the
> > > > model II has USB ports that can automatically use
> > > > the USB wireless cards to
> > > > connect to the internet.
> > > >
> > > > John W. Colby
> > > > www.colbyconsulting.com
> > > >
> > > > -----Original Message-----
> > > > From: accessd-bounces at databaseadvisors.com
> > > > [mailto:accessd-bounces at databaseadvisors.com]On
> > > > Behalf Of Rocky Smolin -
> > > > Beach Access Software
> > > > Sent: Friday, October 31, 2003 8:33 AM
> > > > To: Access Developers discussion and problem solving
> > > > Subject: Re: [AccessD] OT: Wireless network (sort
> > > > of)
> > > >
> > > >
> > > > John:
> > > >
> > > > I heard that you can daisy chain hubs off one of the
> > > > ports on your router to
> > > > get more ports and that you can go up to 255 devices
> > > > from one router this
> > > > way.  Seems to easy and cheap, though.
> > > >
> > > > I've also found that when creating a new network it
> > > > sometimes takes a few
> > > > minutes for the different shared devices to 'see'
> > > > each other - especially on
> > > > the wireless.  So I'll whang around frustrated
> > > > trying to get the network to
> > > > work and then have the same experience you had -
> > > > after a few minutes,
> > > > suddenly the other machines are in my network
> > > > neighborhood.  Go figure.
> > > >
> > > > Rocky
> > > >
> > > > ----- Original Message -----
> > > > From: "John Colby" <jcolby at colbyconsulting.com>
> > > > To: "Database Advisors Inc. (Tech)"
> > > > <Dba-Tech at databaseadvisors.com>;
> > > > "AccessD" <AccessD at databaseadvisors.com>
> > > > Sent: Thursday, October 30, 2003 5:39 PM
> > > > Subject: [AccessD] OT: Wireless network (sort of)
> > > >
> > > >
> > > > > I ordered a Netgear MR814v2 Wireless router a
> > > > couple of weeks ago.  I
> > > > needed
> > > > > to expand my 4 port router (I had 5 things I kept
> > > > needing to plug in) and
> > > > > the Netgear was on sale at www.Newegg.com at the
> > > > time.  I then tried and
> > > > > failed to install a linksys WPC11v2.5 I had laying
> > > > around, so I ordered a
> > > > > dlink dwl-650 that was on sale (rebate) at
> > > > www.newegg.com.  Long story
> > > > > short, it didn't work.  Long story a little
> > > > longer, a very long call to
> > > > > dlink tech support, did not solve the problem.
> > > > >
> > > > > Or maaaaaybe it did.  After failing to figure
> > > > anything out, they
> > > > recommended
> > > > > that I upgrade my laptop bios.  It's an ancient
> > > > (now) 233mhz PII Toshiba
> > > > > Satellite 4000 that I bought with my first
> > > > paycheck from my trip to work
> > > > for
> > > > > Mr. Breen in Dublin Ireland back in hmmm.....
> > > > November 1997?  Getting a
> > > > bit
> > > > > long in the tooth, truth be told.
> > > > >
> > > > > The bios upgrade and also the old "turn off NAV
> > > > before installing etc.
> > > > And
> > > > > "oh by the way, our card requires at least a 300
> > > > mhz processor.  So I
> > > > > uninstalled, upgraded to the latest bios (May
> > > > 2000?), turned off NAV,
> > > > > reinstalled the drivers and re-installed the card.
> > > >  Still no joy.  The
> > > > site
> > > > > survey showed no transmitters, and dlink tech
> > > > support assured me that if
> > > > > there was a transmitter I would see it regardless.
> > > > >
> > > > > Ignorant liars!
> > > > >
> > > > > Went back in and reconfigured the card in the
> > > > laptop for channel 11 (it
> > > > > defaulted to 3 and the router was on 11), played
> > > > around with a couple of
> > > > > other things and boom, I see a transmitter.  Went
> > > > in to the router config
> > > > > page and changed the SSID and sure enough the
> > > > thing I'm seeing on the
> > > > laptop
> > > > > changes to match!  Still no connection though.
> > > > >
> > > > > Rebooted, played around some more and suddenly (no
> > > > clear idea why) I have
> > > > a
> > > > > wireless connection, can browse my network and see
> > > > the web.  Yeaaaaa.
> > > > >
> > > > > Moral of the story, tech support generally sucks,
> > > > play around, don't quit,
> > > > > and eventually the gods will reward you.  Or not.
> > > > >
> > > > > Now, I need to know what to do to tighten this
> > > > thing up so that others
> > > > can't
> > > > > see my network.  I'm a bit afraid to touch
> > > > anything since I don't really
> > > > > know what I did to finally get it running.
> > > > >
> > > > > Can anyone walk me through tightening this up?
> > > > >
> > > > > John W. Colby
> > > > > www.colbyconsulting.com
> > > > >
> > > > >
> > > > > _______________________________________________
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> > > > > AccessD at databaseadvisors.com
> > > > >
> > > > http://databaseadvisors.com/mailman/listinfo/accessd
> > > > > Website: http://www.databaseadvisors.com
> > > > >
> > > >
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> > > >
> > > >
> > > >
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