Latency (in computer networking) is the amount of time that passes between connected computer's sending an instruction to a server and its receiving of a response from it. In an MMO like World of Warcraft, it greatly affects how much a player enjoys the game. In a raiding scenario, a delay of more than 500ms (half of one second) is usually considered unacceptable.While network latency is a significant component of the total delay, it is not the only one. In any case where signals need to be sent from one physical place to another, a time delay will exist, no matter how short the link or how fast the signals can travel.


