Making sense of modern connectivity protocols: There’s a jungle of features and restrictions that apply to various versions of popular standards used by millions of people. Here’s how to tell which USB, Bluetooth, and HDMI-enabled electronics are capable of what.

The not-so-Universal Serial Bus

The “U” in USB stands for “universal,” so – cynically speaking – it’s only fitting that there are several versions, with various differences, that may or may not be backwards- and cross-compatible, and might even interfere with the performance of unrelated devices while potentially compromising security.
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