Wi-Fi is convenient; Ethernet is dependable. A wired link removes buffering caused by weak signal, and most streaming boxes either have a port built in or accept an inexpensive adapter.

What you'll need

  • An Ethernet cable (Cat 5e or better) long enough to reach your router
  • A free LAN port on your router
  • For sticks: the matching Ethernet adapter

The steps

  1. Check for a built-in port

    Roku Ultra, Fire TV Cube, Apple TV 4K (Wi-Fi + Ethernet model), Google TV Streamer, NVIDIA SHIELD TV and onn 4K Pro all have Ethernet ports. If yours has one, plug in the cable and skip to step three.

  2. Or add an adapter to a stick

    Amazon sells an official Ethernet adapter for Fire TV Sticks: it sits between the power cable and the stick's micro-USB port and adds a network jack. For Chromecast with Google TV, a USB-C hub with Ethernet does the same job.

  3. Connect to the router

    Run the Ethernet cable from the device (or adapter) to a free LAN port on your router — not the WAN/Internet port.

  4. Confirm the wired connection

    Devices switch to Ethernet automatically when a live cable is detected. Verify in settings: Roku under Settings > Network, Fire TV under Settings > Network, Apple TV under Settings > Network. It should read 'Wired' or 'Ethernet'.

Worth knowing

  • Flat Ethernet cables run neatly along baseboards and under rugs.
  • A cheap gigabit switch adds ports when the router is full.
  • Powerline adapters are a fallback when running cable isn't possible, but real cable always beats them.

Common mistakes

  • Plugging into the router's WAN port.
  • Buying a USB-A Ethernet dongle for a stick — they only work through the power/OTG path with the right adapter.
  • Leaving Wi-Fi connected at the same time and assuming the wire is being used; check the settings screen.

Research basis: Roku Ultra, Fire TV Cube, Fire TV Stick with adapter, Apple TV 4K, Google TV Streamer, SHIELD TV. Steps checked against current manufacturer documentation as of the last-updated date above.