A service that uses existing phone lines to provide high-speed connections is called .

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.

answer

option a)the former is primarily for third party access to data

.is the correct answer.

key escrow can be characterized as course of action in which the keys expected to break   data are held bonded for some   circumstances and an approved outsider may access those keys.  

while recuperation specialists are the individuals who us in recuperation   of cash or different things.

sory but complete the question