1.PPP(PointtoPoint Protocol), the pointtopoint protocol defined by IETF, is to replace Serial Line Internet Protocol(SLIP). PPP provides solution to the direct data transmission between applications connected with pointtopointline.
4.Second line is topointto smaller than a gleam of meaning, compare grail namely small stock is not pannikin, even outstanding achievement supports, for second line blue prepare.
6.a wave (as a sound wave in a chamber or an electromagnetic wave in a transmission line) in which the ratio of its instantaneous amplitude at one pointto that at any other point does not vary with time.
7.It uses the optical cros s c onvergence theory,where two optical measuring lines intersect at the substance point,to induce a space straight line equation.