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Ethernet Cable Mix n' Match

This is a discussion on Ethernet Cable Mix n' Match within the Modems/Cable/DSL/Satellite forums, part of the Tech Support Forum category. So I'll just explaining this as quick as possible, and the frustration it brings me. I just brought my computer

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Old 06-28-2013, 02:01 PM   #1
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So I'll just explaining this as quick as possible, and the frustration it brings me.

I just brought my computer back to the family home for the summer.

Say I have Ethernet Cable A (3 ft.) and Ethernet Cable B (100 ft.)

Mom's Computer: Recognizes Ethernet Cable A and both B and provides immediate internet.

My Computer: Only Ethernet Cable A provides immediate internet. When Ethernet Cable B plugs in: "Unidentified Network: -> No Internet Access" as well as with troubleshooting "Local Area Connection: Doesn't have a valid ip configuration".

Do ethernets have certain memory capabilities or how is this even possible? I know that ethernet's have different models but both Cable A and B worked on my computer last summer.

The reason I can't just use Cable A is that I need the length of cable B.

Hopefully this is some simple fix. I would really appreciate any insight or wisdom you guys have to offer.
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Old 06-29-2013, 06:36 AM   #2
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Post the output of ipconfig /all using both Ethernet A, then Ethernet B also try to ping your router using Ethernet B, could be a bad end on Ethernet B.
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Old 06-29-2013, 05:16 PM   #3
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Since the cable works on one machine and not another, it's likely that the network interface on the machine that's not working is pickier about the quality of the connection. Likely the cable wasn't terminated properly on one or both ends, so the pickier NIC is not able to negotiate a connection.
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