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You can reduce your exposure to hackers through a cable modem by
disconnecting the network cable to the cable modem when you're
not using the Internet. This doesn't "lose" the connection
(as will disconnecting a phone modem) since the connection is
really between the cable modem and the cable network.
And Ethernet (the cable modem output) doesn't work like the phone line.
When you reconnect the cable the connection will be there.
If it is inconvenient to disconnect the cable frequently, you can
run the cable through a 2-port RJ45 (the plug type) switch box
(about $12) so that you can just turn the switch instead of unplugging
the cable.
Also, did the cable company tell you that your computer must be within
6 feet of the cable mode? Why do you suppose this is? Because the
cable company will only give you a 6-ft cable! Ethernet will run
100 meters (IEEE 100BaseTx specification 802.3u). A 25-ft cable
(CAT5 type) will cost another $12.
donc
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