Laptop Wi-Fi lives in a small M.2 card on the motherboard, with thin antennas routed around the display bezel.

On most notebooks, a USB 2.0 port sits on a side edge; look for a black Type-A without an “SS” mark or blue insert.

On HP laptops, the USB-C port sits on a side edge—left or right on most models—marked by a small oval and icons like “DP” or a bolt.

On many laptops there’s no full-size DisplayPort; look for Mini DisplayPort or USB-C/Thunderbolt ports that carry DisplayPort video.

The Ethernet jack sits on a side edge of many laptops; on slim models, use a fold-down port or a USB-C/Thunderbolt adapter.

On most Asus notebooks, the 3.5 mm combo jack sits on a side edge; some ultra-thin models omit it and rely on USB-C with a dongle.

COM1 lives in Windows under Device Manager > Ports; if no built-in serial jack exists, a USB-to-serial adapter can create COM1.

The HDMI port on a laptop sits on a side edge in most models; some gaming designs place it on the rear for tidy cable routing.

On most Dell notebooks, the 3.5 mm headset port sits on a side edge; some recent models omit it and route audio through USB-C.

Laptop sound comes out of its built-in speakers, or from connected outputs like the headphone jack, HDMI/USB-C, or Bluetooth.