Connect your computer to one of the yellow Ethernet ports or join the default Wi-Fi network.
You might think modern devices are so intuitive that manuals are obsolete. The proves otherwise. Its interface, while powerful, is cryptic. The difference between a frustrating lag-spike and a perfectly optimized home network is often just one setting hidden three menus deep.
You can customize your network name (SSID) and security settings under the menu. Manual Technicolor TD5336 - VDSL PDF - Scribd
Four standard RJ-45 LAN ports for connecting wired devices like computers or game consoles.