Dual Networks? Is this right?

hello, all - i'm sure this topic is out there, i just can't find it, so here goes...
i have an airport EXTREME base station (n) and TWO airport EXPRESS base stations. according to everything i've heard and read, the network will work only as fast as the slowest connection. which means i won't get N speeds, but only G speeds, as the EXPRESS moves at G only. which also means if i breakdown and buy an apple TV, it won't take advantage of the N speed of my new router.
HOWEVER, i believe i read or heard that i could, essentially, set up TWO networks - one with the AEBS and the other using the EXPRESS. that way, i'd be serving N speeds to the TV, and G speeds to my computers (G5, mac mini (core duo only) and powerbook - all of which, by the way, can only obtain G speeds). is this true?
if so, here's what i did - i setup the AEBS (connected to my cable modem) using WDS (at n speed, b/g compatible) as a WDS main, and connected the EXPRESS (as a WDS remote, both on the same channel) to the AEBS via ethernet. it APPEARS i have two networks now under the airport menu in the finder.which, if i've done this right, means i can connect my computers the G network and, when i get the TV, connect that ot my N network. is this at all right, or even close?
i've read the manuals and searched the chats, but seem to be lost on this one. ANY help, advice, direction is CERTAINLY appreciated.
THANKS, oh wonderful mac gurus.

To add to iMacYou's comments,
i have an airport EXTREME base station (n) and TWO airport EXPRESS base stations. according to everything i've heard and read, the network will work only as fast as the slowest connection. which means i won't get N speeds, but only G speeds, as the EXPRESS moves at G only.
It is true that the overall bandwidth of the 802.11n network will take a performance "hit" when non "n" devices are connected to it, but not all the way down to 802.11b/g.
HOWEVER, i believe i read or heard that i could, essentially, set up TWO networks - one with the AEBS and the other using the EXPRESS. that way, i'd be serving N speeds to the TV, and G speeds to my computers (G5, mac mini (core duo only) and powerbook - all of which, by the way, can only obtain G speeds). is this true?
Yes. It is called a "dual-band" network and setting it up is described in the Designing AirPort Networks Using the AirPort Utility document, starting on page 48.
if so, here's what i did - i setup the AEBS (connected to my cable modem) using WDS (at n speed, b/g compatible) as a WDS main, and connected the EXPRESS (as a WDS remote, both on the same channel) to the AEBS via ethernet.
A WDS is NOT what you would want in this scenario, instead you would want to set up a "dual-band" network as described in the link provided above.

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I just had an AHA moment and think I solved my problem.
route -n gives me
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ra0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.18.0.1 0.0.0.0 UG 0 0 0 ra0
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192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ra0
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when sold new
Therefore ONLY O2 can unlock the iPhone
it is NOTHING to do with Apple they have no authority
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Apple do NOT lock iPhones ,carriers do
simple no debate
If you purchased through eBay raise a claim

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Additionally, since I only recently acquired the TC, I originally just added ("bridged") it off of my existing b/g network. With todays move, I decided to switch the 2 base stations and have the TC and its' "n" network the first connection off of the DSL router. Then reconfigured the older ABS Extreme (UFO) to "bridge" off the the TC. While I am convinced that I did not originally have the 2 networks co-mingled (as early speed tests confirmed), I seem to be experiencing improved internet speeds in the 5Ghz ("n") network. Could this be due to no longer "bridging" the TC through the older ABS Extremes' internal Ethernet switch?
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DSL service is AT&T U-Verse, provided via a 2WIRE modem/router located in the basement. The house is extensively hardwired with CAT5 cables that all terminate at the 2WIRE location, so I have strong wired support wherever I need it. But the 2WIRE is a poor wireless device, and its location in the basement further limits its usefulness.
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Message was edited by: PTDiMarzio
A diagram of what I'd like to have ...
2WIRE --> various existing wired and wireless devices
|
--> Time Capsule
| | |----> various wireless devices
| |
| ----> hardwired to MBP for TM use
|
|----> hardwired to Buffalo NAS, visible to MBP
Message was edited by: PTDiMarzio

Welcome to the discussion area, PTDiMarzio!
I'd keep the 2WIRE in place, serving the hardwired locations as it does today and leaving it's radio on for the non-Apple devices. I would connect the run from the 2WIRE to the office (which currently feeds the Cisco switch) to the TC and configure the TC in bridge mode so it basically extends the 2WIRE network.
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I would be able to use the TC's wireless for the Apple devices in the house.
The TC will create a dual band network, so you'll have the advantage of both 5 GHz and 2.4 GHz bands for your wireless devices. Since the TC will be in bridge mode, it will not be possible to enable the separate Guest Network feature on the TC...a possible downside depending on your plans.
I would hardwire the TC-MBP connection for TM purposes to get better performance, and also run the Buffalo off the TC via wire.
You will be able to take advantage of the Gigabit ethernet capability of the TC and your devices. I'm not sure if the Buffalo drive has Gigibit ethernet ports or not.
Does this make sense and, more importantly, will it work?
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