layer 1 of the osi model, which provides the electrical and mechanical connection to the network  ex) (eia/tia)-related technologies, utp, fiber, and network interface cards (nics)
layer 1 of the osi model, which provides the electrical and mechanical connection to the network. (hub)
Within two years , 259 , or 10 percent , of the youths reported they had started to smoke or had at least taken a few puffs .