A conference-room projector offers a single digital input port labeled HDMI. The employee's laptop has the same type of port. To send both the presentation's video and its soundtrack over one cable, which cable with identical connectors on each end should the employee use?
RJ-45 cable
DisplayPort cable
HDMI cable
VGA cable
An HDMI cable carries uncompressed digital video and multi-channel audio through a single 19-pin connector. Because both the laptop and the projector expose HDMI ports, using an HDMI cable allows the employee to transmit picture and sound without any additional adapters or audio leads. VGA can only carry analog video, DisplayPort-while capable of audio-would not fit the projector's HDMI port without an adapter, and RJ-45 is reserved for Ethernet data rather than A/V signals.
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