Can sharing a (cable) internet connection using a router make the connection slower?
by 
Ali Bulut
ANSWERS: 3
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Yes, especially if the cable has been spliced.
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It depends... Usually no one will notice any impact on bandwidth, unless your doing bandwidth intensive stuff. Litterally, the answer should be "no" since the question was phrased "the connection"... the connection should show the same throughput up and down. The clients may see some impact, though. Remember that downloading is usually much higher bandwidth than uploading, and that some things like online games, grokster/kazaa, and streaming multimedia are the bandwidth hogs.
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The cable being spliced has very little to do with a decrease in speed..... UNLESS the modem line was not installed correctly. Here's how it goes.... The cable meets your house/apartment/cardboard box/whatever and is grounded to an earth ground. From the grounding block it goes to a cable modem specific splitter (usually a DC6) and that line goes STRAIGHT to your cable modem. It does not stop anywhere else. It doesn't get split for cable in your room. It doesn't get split for your cool new ATi All In Wonder. It goes straight to your modem. The second leg off of the DC6 goes to a splitter for the TV service for how ever many outlets you have. If you only have ONE cable TV outlet and your cable modem, then it can be split anywhere along the line. But your cable modem line should have NO splits in it from the DC6 to your modem. Splices are fine for something like a wall plate or the likes.
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