Moving a wireless router
My router is located at an outside corner of our home's living room, consequently the signal has a number of walls to go through to get to the far diagonal corner of the house several rooms away. With some effort I could relocate the router and modem to a central room but would leave the three connected Ethernet cables currently plugged into the router in the corner where they are presently located (TV tuner, HTPC, & DVD player). So I'm wondering what my options might be for dealing with these Ethernet cables? Can I run one Ethernet cable from the moved router back to the original corner location and plug it into a switch (I know zip about switches) which the three devices would also plug into? Is that what switches are for? If so, would the signal coming out of the switch be noticeably degraded? Are there other options? Thanks.