USB-C
How to tell what a USB-C port supports. What cable works.
Data, video, power, cable traps
Port Guides
Port names, what they do, what limits apply, and what cables work.
HDMI
Bandwidth, 4K, HDR, ARC, eARC.
Versions, limits, when to upgrade
DisplayPort
When DP wins. Adapter rules.
Alt mode, adapters, refresh rate
Ethernet
Link, activity, speed hints. Fix steps.
LEDs, cable types, PoE basics
Optical audio
Formats, limits, when to switch.
TOSLINK, adapters, ARC comparison
3.5mm audio
TRS vs TRRS. Headset wiring.
Connector types, common fixes
Docks & hubs
Avoid wrong hubs. Match laptop port support.
Thunderbolt, USB-C, compatibility checks