I'm working for a small business which has less than 50 devices on a network. About 25 are connected wirelessly to an 802.11n router which is the DHCP server and is plugged into our cable modem. An Ethernet switch is also plugged into the router, and the rest of the devices are plugged into that switch. Our building is fairly large, more than 120 feet long, much of which is open space. The walls are made of concrete. On the far end of the building from the router, the wireless signal is poor.
I think it would be best to run a cat 6 cable to that part of the building and have a device there that will extend my existing wireless network. I think that would be better to have this device be wired to the network rather than repeating/boosting a poor wireless signal. I want to have one local network throughout the whole building, rather than have two SSIDs, and preferably one subnet.
Is this possible? What kind of device would I use?