The Android operating system features portable HOTSPOT functionality. You can use the Internet from your network to broadcast it over the WiFI or USB (using a cable).
In order to do this, please navigate to Settings > Wireless & Networks > Tethering & portable hotspot and enable Portable WiFi Hotspot. Under this option there is another one (Portable WiFi hotspot settings) where you can configure some settings related to security (encryption mode, password, SSID, etc).