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20 hours ago · Wi-Fi - Wikipedia ... Wi-Fi
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20 hours ago · The new cable-modem even had the same internal IP address that I was using on the old, failed cable-modem. I was using a ten-dot address, and the new cable-modem just happened to have that same, exact IP address already set. So Comcast knows your internal (LAN) IP address. Of course they would know, and set, the WAN IP address.