cant connect new pc build to ethernet

plugged in an ethernet cable from my new pc to my moms laptop (since mine doesn't have a port), and ethernet says either identifying (with a yellow thing on it) or not connected (with a red circle and a white x on it), I've really got no clue what to do now so any help is appreciated!

Submitted September 01, 2017 at 06:16AM by flopadu http://ift.tt/2wmsRpN