In order to cover a long distance, a signal booster or an active cable to amplify the signal might be needed. For DisplayPort, 3840- by- 2160 pixels (4K) video over a length up to 2 meters by using a passive cable can be achieved.
Also, running a passive cable up to 15 meters is possible, but resolution will be limited to 1080p (full-HD), as defined by the standard. Ethernet channel DisplayPort does not support Ethernet data and the standard does not have an audio return channel, while by using the latest version of HDMI, 100 Mbps HDMI Ethernet Channel (HEC) can be implemented.