A very cheap alternative to networking computers together in your home, without running network cable, is to use networking adapters that are engineered to use the electric grid in your house. Typically you connect one of the adapters to your modem/router via ethernet cable, then plug the adapter into a wall plug. Then you place another adapter, plugged into a electric outlet, that is subsequently connected to the device .(i.e. Smart TV, Gaming Consoles, Home Surveillance Device, etc.) that you desire to connect to. After the adapters are setup, you simply sync the adapters by pushing a button on the adapters. Once they are synced and the lights on the adapter show a connection, then you are networked.
To give an example of such an adapter, I took a look at the Rosewill RPLC-201PKIT 200Mbps Powerline AV Pass-Through Adapter. What I like about this adapter is that even though it uses an electrical outlet, it gives you a pass-through outlet back so that you can still use the outlet. One thing about these adapters; do not plug them into a surge protector. This will cause the adapter to either not work or may seriously degrade your network bandwidth connection.
Standards: IEEE 1901 and HomePlug AV compliantCo-existence with HomePlug 1.0 NodesIEEE802.3, IEEE802.3u
Encryption: 128-bit AES Encryption
Ports: 10/100Mbps Ethernet port
LEDs: Power, Ethernet, Data
Powerline Speeds: Up to 200Mbps
Connection Type: RJ45
Connection Speeds: 10/100M
Kit Type: Double
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