I assume you want to connect your smart TV to your network (e.g. to get Internet access for NetFlix).
Depending upon the precise model, it will support WiFi or wired Ethernet (or both). If your TV supports a wired connection, that will provide the best performance. All you need is a spare port on your router/switch and a straight-through network cable.
If your TV supports WiFi, you'll need to get into the its setup to enter the settings matching your home network - that is, you must choose the SSID (essentially, your WiFi network name; so your TV connects to your network and not your neighbor's) and wireless security information.
Answers & Comments
I assume you want to connect your smart TV to your network (e.g. to get Internet access for NetFlix).
Depending upon the precise model, it will support WiFi or wired Ethernet (or both). If your TV supports a wired connection, that will provide the best performance. All you need is a spare port on your router/switch and a straight-through network cable.
If your TV supports WiFi, you'll need to get into the its setup to enter the settings matching your home network - that is, you must choose the SSID (essentially, your WiFi network name; so your TV connects to your network and not your neighbor's) and wireless security information.