sorry guys! im new here trying to learn about the computer networks. my question is, in my accomadation i have wireless internet connection,the technician has fixed something in the top of the house looks like square plate i don\'t know wat is dat and he ran a one end of the rj45 from there to the netgear and connected to the accespoint. while he was doing that before he pluged that cable in to the netgear he put the rj45 cable in his laptop and typed ping in cmd mode.. my question is why would he do the ping and what it does? pls help me replying