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post #1 of 6 (permalink) Old 01-19-2006, 10:03 AM Thread Starter
 
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Question dual lan

Im looking at building a new computer, but what it the purpose of having two lan ports?
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post #2 of 6 (permalink) Old 01-19-2006, 10:31 AM
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If this is for home, no reason to have them.

Three reasons to use a dual LAN configuration (that I can think of):
#1 - The machine needs accesses to two separate networks. My guess is that you are not running that (if this is for home).

#2 - Increase network access speed. Dual LAN ports can be used to increase network access speed by load-balancing between them. Since your connection to the internet is going to be slower than the capacity of just one LAN port, not going to get you anything there either.

#3 - Dedicated connection to another machine. Some devices can be accessed more quickly if they have their own connection to the computer rather than across a network.

Perhaps someone else might have other thoughts, but those are the only reasons I can see for having two ports.
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post #3 of 6 (permalink) Old 01-19-2006, 01:30 PM
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Home made gigabit routers

You can use these as firewalls or routers.

I have two gigabit poerts on my mobo, I don't use them except at lan parties to split network load. I hate lag and with this system there is none!

What ever you get, make sure it has Gigabit lan! Gigabit is the future and you might as well get a board with it. Gigabit switches are getting cheap and it's only a matter of time before it is mainstream. Make sure you get a 64 bit CPU, you'll appreciate it in Linux x86-64 or the upcoming Windows Vista.

Oh yeah, get an AMD CPU, less heat, more speed, less money! If you go AMD make sure you get socket 939 instead of 754, 939 is quite a bit faster due to dual channel memory.
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post #4 of 6 (permalink) Old 01-19-2006, 04:58 PM Thread Starter
 
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i was planning on getting an X2 with sli, but wasnt sure if the dual lan would speed up internet games or not. Im still not sure if i want to use 939 or wait until M2 comes out, but if i decide to wait ill have more money saved and being able to use DDR2 might make me wait.
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post #5 of 6 (permalink) Old 01-19-2006, 06:59 PM
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Quote:
Originally Posted by The newbee
i was planning on getting an X2 with sli, but wasnt sure if the dual lan would speed up internet games or not.
Like Hardwareguy said, it would speed up games if you were in a LAN party, but not going to do much over the internet since you would be connecting at least a 100 MB LAN port to a 2.5 MB internet connection (or whatever you have). You are only going to be as fast as the slowest link.

Whether you get a 10/100 card or a 10/100/1000 card is up to you. While things are headed that direction, you might check the ports on your router. My guess is that it will only handle up to 100 MB. By the time you can make use of the GB LAN port, the rest of the computer will be out-of-date. I have seen them for as low as $20, so you might as well get one. I would imagine that the MOBO will have it integrated anyway.
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post #6 of 6 (permalink) Old 01-19-2006, 10:13 PM
 
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In the home environment, you could use it for ICS.
If you dont have a DSL/Cable router, and have Windows OS you can use the two LAN ports to implement Internet Connection Sharing (ICS).

One port hooks up to your Cable/DSL modem and the other connects to another computer or hub. This allows the other computers in your mini-network to access the internet. The drawback is that the computer that is connected to the modem must be up and running or ICS will not work.
Its a bit ghetto in my opinion and is too much trouble than its worth. You would be better off investing in a decent router so that all computers have independent access to the internet.

In professional environments, a multi-lan port motherboard may be needed. In some customers' systems that we set up, one computer may need to access two separate networks. 1 vpn + local intranet for example. Or the computer may need direct cat5 connections to two separate computers, like in the case of a radiology technician's workstation where it needs to be hooked up simultaneously to a patient database and the actual imaging machine (MRI, CT Scan, etc) but the two networks may be sitting on different backbones.
In the old days, we would need to plug in two or more PCI or ISA lan cards, which reduces the available slots for any other cards.

The new motherboards these days are nice. Because most of the devices you need are built in. (However, I still hold a grudge on built in video cards).
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