Blue chips edged lower by midday on Wednesday as a wave of profit warnings drained some of the optimism that has driven a rally over the past three months .
U.S. stocks fell in early morning trade on Wednesday as a wave of profit warnings drained some of the optimism that has driven a rally over the past three months .
third layer in the tcp/ip stack. routers and other hardware operate on this layer. determining the path that packets will take using ip addresses.